Mobile station, base station and wireless communication method

ABSTRACT

Method and apparatus are provided for mapping an operating frequency band of a mobile station device in a mobile communication system. As operating frequency band position at the time of idle mode of respective mobile station devices is arranged so as to be distributed throughout a unique frequency bandwidth of a base station device.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. patent application Ser. No.US 12/083,049, filed Apr. 3, 2008, now allowed, which is a continuationof International Application No. PCT/JP2006/319695, filed Oct. 2, 2006,which claims priority to Japanese Patent Application No. JP2005-290707,filed Oct. 4, 2005 and JP2005-319363, filed Nov. 2, 2005. Theaforementioned patent applications are hereby incorporated by referencein their entireties.

TECHNICAL FIELD

The present invention relates to mobile communications, and moreparticularly to mobile stations, base stations and communicationsmethods that utilize one or more of control signaling and paging.

BACKGROUND OF THE INVENTION

In 3GPP (3rd Generation Partnership Project), W-CDMA (Wideband CodeDivision Multiple Access) mode is standardized as a third-generationcellular mobile communication mode and the service is sequentiallystarted (see, e.g., non-patent document 1). One CDMA mode is a spreadspectrum mode of FDD with 5-MHz radio frequency bandwidth, and radiophysical channels are differentiated by spread codes andcode-multiplexed for transmission in the same radio frequency bandwidth.

The W-CDMA mode includes a radio link from the mobile station to thebase station (hereinafter, uplink) and a radio link from the basestation to the mobile station (hereinafter, downlink). The uplink andthe downlink include logical channels (Logical Channel) at SAP (ServiceAccess point) between a layer 3 and a layer 2, transport channels(Transport Channel) for providing service from a layer 1 to the layer 2,and physical cannels (Physical Channel) defined as a transmissionchannel between radio nodes (base station and mobile station) of thelayer 1 for implementing transmission through the transport channel withthe use of an actual radio transmission path (see, e.g., non-patentdocument 2).

The physical channels of the downlink of the W-CDMA are a common pilotchannel CPICH (Common Pilot Channel), a synchronization channel SCH(Synchronisation Channel), a paging indicator channel PICH (PagingIndicator Channel), a primary common control physical channel P-CCPCH(Primary Common Control Physical Channel), a secondary common controlphysical channel S-CCPCH (Secondary Common Control Physical Channel), adownlink dedicated physical data channel DPDCH (Dedicated Physical DataChannel), a downlink dedicated physical control channel DPCCH (DedicatedPhysical Control Channel), an acquisition indicator channel AICH(Acquisition Indicator Channel), etc.

The physical channels of the uplink of the W-CDMA are a physical randomaccess channel PRACH (Physical Random Access Channel), an uplinkdedicated physical data channel DPDCH, and an uplink dedicated physicalcontrol channel DPCCH.

In the downlink of the W-CDMA, the primary common control physicalchannel P-CCPCH includes a broadcast channel BCH (Broadcast Channel) ofthe transport channel, and the secondary common control physical channelS-CCPCH includes a forward access channel FACH (Forward Access Channel)and a paging channel PCH (Paging Channel). The downlink dedicatedphysical data channel DPDCH includes a downlink dedicated channel DCH(Dedicated Channel) of the transport channel.

In the uplink of the W-CDMA, the physical random access channel PRACHincludes a random access channel RACH (Random Access Channel) of thetransport channel, and the uplink dedicated physical data channel DPDCHincludes an uplink dedicated channel DCH (Dedicated Channel).

A high-speed downlink packet wireless access HSDPA (High Speed DownlinkPcket Access) (non-patent document 3) mode is standardized that appliesthe downlink of the W-CDMA mode to high-speed packet communication.

The downlink physical channels of the HSDPA mode are a high-speedphysical downlink shared channel HS-PDSCH (High Speed Physical DownlinkShared Channel) and an HS-DSCH-related shared control channel HS-SCCH(HS-DSCH-related Shared Control Channel).

The uplink physical channels of the HSDPA mode includes anHS-DSCH-related uplink dedicated physical control channel HS-DPCCH(Dedicated Physical Control Channel for HS-DSCH).

In the downlink of the HSDPA, the high-speed physical downlink sharedchannel HS-PDSCH includes a high-speed downlink shared channel HS-DSCH(High Speed Downlink Shared Channel) of the transport channel.

The outline of the major physical channels and transport channels of theW-CDMA will then briefly be described.

The common pilot channel CPICH is a downlink common channel existing ineach cell and is mainly used for propagation path status estimation(Channel Estimation) of downlink channels, cell selection for mobilestations (Cell Search), and timing reference of other downlink physicalchannels in the same cell, etc.

The synchronization channel SCH is a downlink common channel existing ineach cell and is used in the initial stage of the mobile-station cellsearch.

The paging indicator channel PICH is a downlink common channel forming apair with a paging channel PCH (Paging Channel) of the transport channelcorresponding to the secondary common control physical channel S-CCPCHhaving a paging signal mapped thereon and transmits the presence orabsence of voice-call (CS: Circuit Switch) or packet-call (PS: Packetswitch) incoming-call information for incoming call groups that aregroups of mobile stations. When a mobile station belonging to anincoming call group #n is notified of the presence of an incoming callfor the incoming call group #n through the paging indicator channelPICH, the mobile station receives the paging channel PCH in thecorresponding radio frame mapped on the secondary common controlphysical channel S-CCPCH to determine the presence or absence of theincoming call.

The paging indicator channel PICH is a channel set with the aim ofreducing a discontinuous reception IR (Intermittent Reception) rate forimproving battery saving in the mobile stations. The paging indicatorchannel PICH transmits a short paging indicator PI (Paging Indicator)for notifying the mobile stations of the presence or absence of anincoming call to the mobile stations belonging to the incoming callgroup #n and the mobile stations normally receive only the pagingindicator PI in a standby state (idle mode). Only when the mobilestation is notified of the presence of an incoming call through thepaging indicator PI, the mobile station receives the paging channel PCHcorresponding to the paging indicator PI.

Since the paging indicator PI is allocated to a plurality of theincoming call groups #n and a reception frequency per incoming callgroup #n can extremely be lowered, the mobile station in the standbystate (idle mode) may receive only the short paging indicator PI, whichcan extremely reduce the frequency of receiving the paging signal of thelong paging channel PCH (having a large amount of information).

The primary common control physical channel P-CCPCH is a downlink commonchannel existing in each cell and has a broadcast channel BCH (BroadcastChannel) of the transport channel mapped thereon to transmit broadcastinformation such as system information and cell information.

The secondary common control physical channel S-CCPCH is a downlinkcommon channel and a plurality of these channels can exist in each cell.The forward access channel FACH (Forward Access Channel) and the pagingchannel PCH (Paging Channel) are mapped thereon, which are the transportchannels. The forward access channel FACH is a downlink common channeland is used for transmitting control information and user data. Theforward access channel FACH is shared and used by a plurality of mobilestations and is used for low-rate data transmission from a higher-levellayer.

The paging channel PCH is a downlink common channel forming a pair withthe paging indicator channel PICH as above and is used for transmittingthe paging signal. The paging signal includes messages such as a mobilestation ID (UE identity), a core network ID (CN identity), and a Pagingcase (Paging cause).

With regard to the downlink/uplink dedicated physical data channelsDPDCH and the downlink/uplink dedicated physical control channels DPCCH,the downlink dedicated physical data channel DPDCH and the downlinkdedicated physical control channel DPCCH are time-multiplexed in a timeslot in the case of the downlink, and the uplink dedicated physical datachannel DPDCH and the uplink dedicated physical control channel DPCCHare mapped to I-phase and Q-phase, respectively, in the case of theuplink. One or more downlink/uplink dedicated physical data channelsDPDCH are allocated to a mobile station (spread code multiplexing) andused for the data transmission from a higher-level layer. Only onedownlink/uplink dedicated physical control channel DPCCH is allocated toa mobile station and used for the physical layer control.

The acquisition indicator channel AICH is a downlink common channelforming a pair with the physical random access channel PRACH. Theacquisition indicator channel AICH is used for the random access controlof the physical random access channel PRACH.

The physical random access channel PRACH is an uplink common channel andhas mapped thereon the random access channel RACH that is the transportchannel. Random access is applied to use this channel for sendingcontrol information at the time of transmission. This channel is alsoused for data transmission (mainly at lower rate) from a higher-levellayer.

The outline of the major physical channels and transport channels of theHSDPA mode will then briefly be described.

The high-speed physical downlink shared channel HS-PDSCH of the HSDPAmode is a downlink shared channel shared by a plurality of mobilestations and includes a high-speed downlink shared channel HS-DSCH (HighSpeed Downlink Shared Channel) of the transport channel for each mobilestation. The HS-PDSH is used for transmitting packet data addressed tothe mobile stations from a higher-level layer.

The HS-DSCH-related shared control channel HS-SCCH of the HSDPA mode isa downlink shared channel shared by a plurality of mobile stations andtransmits to the mobile stations the information necessary fordemodulating the high-speed downlink shared channel HS-DSCH (modulationmode, spread code) and the information necessary for error correctiondecoding process and a hybrid automatic repeat request HARQ (HybridAutomatic Repeat reQuest).

The HS-DSCH-related uplink dedicated physical control channel HS-DPCCHis an uplink dedicated control channel and is used for transmittingdownlink quality information CQI (Channel Quality Indication)representing a downlink radio propagation path status and ACK/NACK(Acknowledgement/Negative Acknowledgements) that is receptionacknowledgement information corresponding to the hybrid automatic repeatrequest HARQ.

On the other hand, the evolution of the third generation radio access(Evolved Universal Terrestrial Radio Access, hereinafter, EUTRA) and theevolution of the third generation radio access network (EvolvedUniversal Terrestrial Radio Access Network, hereinafter, EUTRAN) areexplored. The OFDM (Orthogonal Frequency Division Multiplexing) mode isproposed for the downlink of the EUTRA. The EUTRA technology applied tothe OFDM mode is a technology such as adaptive modulation/demodulationerror correction mode (AMCS: Adaptive Modulation and Coding Scheme,hereinafter, AMCS mode) based on adaptive radio link control (linkadaptation) such as channel coding.

The AMCS mode is a mode of switching radio transmission parameters(hereinafter, AMC mode) such as an error correction mode, an encodingrate of error correction, a data modulation multi-valued number, a codespreading rate (SF: Spreading Factor) of time/frequency axes, and amulti-code multiplexing number depending on the propagation pathstatuses of the mobile stations to efficiently perform high-speed packetdata transmission. For example, with regard to data modulation, themaximum throughput of a communication system can be increased byswitching to the multi-valued modulation with higher efficiency such asfrom the QPSK (Quadrature Phase Shift Keying) to the 8-PSK modulationand the 16-QAM (Quadrature Amplitude Modulation) modulation as thepropagation path status is improved.

With regard to disposition of the downlink physical channels and thetransport channels in the OFDM mode, a method of multiplexing thephysical control channel and the physical data channel in the samefrequency band through the spread code multiplexing is proposed for theSpread-OFDM mode (see, e.g., patent document 1). In a method proposedfor the Non Spread-OFDM mode (e.g., wireless LAN standard 802.16), theresources of the frequency axis (sub-carrier) and the time axis (OFDMsymbol) of the OFDM are used to multiplex the channels in time/frequencythrough the time division multiplexing TDM (Time Division Multiplexing),the frequency division multiplexing FDM (Frequency DivisionMultiplexing), or a combination of TDM/FDM.

The technical requirements of the EUTRA/EUTRAN are proposed (see, e.g.,non-patent document 4), which request spectrum flexibility forintegration and coexistence with existing 2G and 3G services and requestsupport for spectrum allocations to different size spectrum (frequencybandwidth, e.g., 1.25 MHz, 2.5 MHz, 5 MHz, 10 MHz, 20 MHz).

The technical information of the EUTRA is proposed (see non-patentdocument 5), which shows a method of frequency band positionspecification (center-frequency shifting) to be used for a mobilestation capable of transmission/reception in different frequencybandwidths. Description will be made with reference to FIG. 37. When abase station supports a unique maximum frequency bandwidth, for example,a frequency bandwidth of 20 MHz and a mobile station supports a uniquemaximum frequency bandwidth, for example, a bandwidth of 5 MHz, themobile station first uses the downlink synchronization channel DSNCH andthe downlink pilot channel DPCH to perform cell search. Hereinafter, agroup of mobile stations capable of transmission/reception in differentfrequency bandwidths, for example, Bn frequency bandwidths (Bn=1.25,2.5, 5, 10, 15, and 20 MHz) is defined as a Bn mobile station class; amobile station capable of transmission/reception in the Bn frequencybandwidth is defined as a mobile station of the Bn mobile station class;and a transmission/reception frequency bandwidth Bn of the mobilestation defined by the Bn mobile station class is defined as a uniquefrequency bandwidth Bn of the mobile station.

Specifically, the mobile station detects a downlink synchronizationchannel DSNCH at 5 MHz, which is the center of the 20-MHz bandwidth, andthen receives a downlink common control channel DCCCH. The downlinkcommon control channel DCCCH includes transmission bandwidth informationand frequency shift information for specifying frequency band positionsto be used by respective mobile stations in different mobile stationclasses. The mobile station moves to the operating frequency bandposition in accordance with the control information to start datatransfer. The downlink channels DSNCH and DCCCH will be described later.

As above, in the 3GPP (3rd Generation Partnership Project), the W-CDMA(Wideband Code Division Multiple Access) mode is standardized as thethird generation cellular mobile communication mode and the service issequentially started (see, e.g., non-patent document 1).

In the conventional mobile communication systems such as GSM (GlobalSystem for Mobile Communications) or W-CDMA, subscriber identifiers IMSI(International Mobile Subscriber Identity) are used for mobilitymanagement. The core network of the W-CDMA mode is configured based onthe core network of the GSM. The movement managing method of the W-CDMAmode will be described with reference to FIG. 38.

An RNC (Radio Network Controller) (50) is a radio controlling device anda controlling device managing radio resources and controlling Nodes B(10). The RNC (50) controls handover, for example.

The Node B (10) is a logical node performing radiotransmission/reception and is specifically a radio base station device.The Node B (10) is connected to a mobile station device 20 through aradio interface.

An SGSN (Serving GPRS Support Node) (30) is a control node for thepacket switched service of the core network and includes a VLR (VisitorLocation Register) (31) that manages subscriber information of visitedsubscribers.

Attach is mainly performed at the time of power-on of a mobile station20. In a procedure for managing whether a terminal can receive anincoming call, an incoming call can be received in the attached stateand an incoming call cannot be received in the detached state.

Location registration is performed if the mobile station moves alocation registration area 40, and the subscriber information isdownloaded from an HLR (Home Location Register) not shown in theprocedure to the visited VLR (31).

The attach and the location registration process can concurrently beexecuted. When detecting a change in the location registration area 40from broadcast information, the mobile station 20 makes a locationregistration request including a subscriber identifier IMSI to the VLR(31) of the SGSN (30) through the Node B (10) and the RNC (50). The VLR(31) downloads and allocates the subscriber information from the HLR asa temporary subscriber identifier to a TMSI (Temporary Mobile SubscriberIdentity) and transmits a response message of the location registrationto the mobile station 20.

Since the TMSI is used for identifying users over the air, security canbe improved by hiding the IMSI as compared to the case of using theIMSI, and since the TMSI is used which has about half amount ofinformation relative to the IMSI, an information amount can be reducedover the air.

A process procedure of paging will then be described with reference toFIG. 39. In mobile communication, if an incoming call exists for themobile station 20, the mobile station 20 must be notified of thepresence of the incoming call. The location information of the mobilestation 20 is managed through the location registration area 40 in thenetwork, and all the mobile stations are notified of the presence of theincoming call in a broadcasting manner in the location registration area40 where the location of the mobile station 20 is registered. Thisprocedure is referred to as paging.

The paging is performed by sending a paging request signal from the VLR(31) to all the RNC (50) containing the location registration area 40registered in the visited VLR (31). Using the TMSI for the subscriberidentifier in this case is advantageous as above from a viewpoint ofsecurity and signal amount as compared to the case of using the IMSI.

Since the mobile station 20 always monitors a channel for call-out inthe case of the idle mode (standby state), the mobile station 20 canrecognize the paging to the own station. The mobile station 20 returns aresponse to the network if the location registration area and the TMSI(IMSI) included in the paging request are identical to the locationregistration area and the TMSI (IMSI) stored in itself.

The outline of the major physical channels and transport channels of theW-CDMA will then briefly be described.

The paging indicator channel PICH is a downlink common channel forming apair with the paging channel PCH (Paging Channel) of the transportchannel corresponding to the secondary common control physical channelS-CCPCH having a paging signal mapped thereon. The PICH transmits thepresence or absence of voice-call (CS: Circuit Switch) or packet-call(PS: Packet Switch) incoming-call information for incoming call groupsthat are groups of mobile stations.

When a mobile station belonging to an incoming call group #n is notifiedof the presence of an incoming call for the incoming call group #nthrough the paging indicator channel PICH, the mobile station receivesthe paging channel PCH in the corresponding radio frame mapped on thesecondary common control physical channel S-CCPCH to determine thepresence or absence of the incoming call to itself.

The paging indicator channel PICH is a channel set with the aim ofreducing a discontinuous reception IR (Intermittent Reception) rate forimproving battery saving in the mobile stations. The paging indicatorchannel PICH transmits a short paging indicator PI (Paging Indicator)for notifying the mobile stations of the presence or absence of anincoming call to the mobile stations belonging to the incoming callgroup #n and the mobile stations normally receive only the pagingindicator PI in the standby state (idle mode). Only when the mobilestation is notified of the presence of an incoming call through thepaging indicator PI, the mobile station receives the paging channel PCHcorresponding to the paging indicator PI.

The paging indicator PI is allocated to a plurality of the incoming callgroups #n and a reception frequency per incoming call group #n canextremely be lowered. Therefore, the mobile station in the standby state(idle mode) may receive only the short paging indicator PI, which canextremely reduce the frequency of receiving the paging signal of thelong paging channel PCH (having a large amount of information).

Patent Document 1: Japanese Laid-Open Patent Publication No. 2001-237803

Patent Document 2: Japanese Patent Application Laid-Open Publication No.2004-297756

Non-patent Document 1: 3GPP TS 25.211, V6.4.0 (2005-03), Physicalchannels and mapping of transport channels onto physical channels.http://www.3gpp.org/ftp/Specs/html-info/25-series.htm

Non-patent Document 2: Keiji Tachikawa, “W-CDMA Mobile CommunicationsSystem”, ISBN4-621-04894-5, P103, P115, etc.

Non-patent Document 3: 3GPP TR (Technical Report) 25.858, and 3GPPdocuments related to HS DPA specifications,http://www.3gpp.org/ftp/Specs/html-info/25-series.htm

Non-patent Document 4: 3GPP TR (Technical Report) 25.913, V2.1.0(2005-05), Requirements for evolved Universal Terrestrial Radio Access(UTRA) and Universal Terrestrial Radio Access Network(UTRAN).http://www.3gpp.org/ftp/Specs/html-info/25913.htm

Non-patent Document 5: 3GPP R1-050592 NTT DoCoMo “Physical ChannelConcept for Scalable Bandwidth in Evolved UTRA Downlink”.

DETAILED DESCRIPTION

As is evident from the foregoing Background discussion, no specific ideahas been proposed for contents of transfer bandwidth information andfrequency shift information for specifying a frequency band position tobe used by a mobile station in a different mobile station class in abovepatent documents.

In general, it is contemplated that the control information is exchangedbetween the base station and the mobile stations through thedownlink/uplink control channels and that the control information istransmitted to a certain mobile station to specify operating frequencyband positions at the time of the idle mode and the active mode. If thecontrol information is exchanged before shifting the operating frequencyband position, communication is very congested at the center frequencyband of the unique frequency bandwidth of the base station, for example,at a 5-MHz frequency band that is the center of a 20-MHz frequencybandwidth. Since the control information is exchanged between the basestation and the mobile stations, radio resources are used, leading toreduction in the frequency utilization efficiency of the overall system.Complicated base station control is also needed such as management andstorage of the operating frequency band position and avoidance ofcommunication congestion in some frequency bands for a certain mobilestation.

The present invention was conceived to solve the above problems and itis therefore an object of the present invention to provide a mobilestation device, a base station device, a mobile station device operatingfrequency band mapping method, and a program for executing the methodand a recording medium, which can efficiently use radio resourcesthrough the operating frequency bands adapted to mobile stations indifferent mobile station classes (shifting of the center frequency) toimprove the frequency utilization efficiency of the overallcommunication system and which can efficiently execute the base stationcontrol of the operating frequency band for a certain mobile station.

In above patent documents, no specific idea has been proposed for how tospecify the center frequency position to shift within the uniquefrequency bandwidth of the base station for mobile stations withdifferent frequency bandwidth abilities (e.g., 1.25 MHz, 2.5 MHz, 5 MHz,10 MHz, 20 MHz) and how to perform the paging for the mobile stations inthe standby state at the shifted frequency positions.

In general, it is contemplated that the control information is exchangedbetween the base station and the mobile stations through thedownlink/uplink control channels and that the control information istransmitted to a certain mobile station to specify a position of thecenter frequency to which the mobile station should be shifted. In thiscase, the mobile station in the idle mode must register a shiftedfrequency position to the base station each time the base station ischanged and an amount of signals for control is significantly increased.

In an existing mechanism of location registration, only the subscriberidentification information IMSI is registered in the VLR, and noinformation is maintained about which is the waiting frequency bandposition of the mobile station called through the paging. Therefore, thepaging indicator channel PICH and the paging channel PCH must beprepared as in the W-CDMA mode to define the reception at a certainfrequency band position.

In this case, since the mobile station must periodically shift thecenter frequency to acquire the paging indicator channel PICH and thepaging channel PCH, the process becomes complicated. Since the basestation cannot identify the shifted frequency position of the mobilestation, delivery of the scheduling information to the mobile stationbecomes complicated and a longer time is required for transition fromthe paging to the communicating state.

The present invention was conceived to solve the above problems and itis therefore an object of the present invention to provide a mobilestation device, a base station device, a location management device, amobile station device location registration method, a paging method, anda program for executing the methods and a recording medium adapted to amobile communication system containing mobile stations with differentfrequency bandwidth abilities (e.g., 1.25 MHz, 2.5 MHz, 5 MHz, 10 MHz,20 MHz).

MEANS FOR SOLVING THE PROBLEMS

In order to solve the above problems, a first technical means is amobile station device used in a mobile communication system, anoperating frequency band position of the mobile station device being acertain frequency position calculated at least from identificationinformation of the mobile station device, a unique frequency bandwidthof the mobile station device, and a unique frequency bandwidth of a basestation device.

A second technical means is a mobile station device used in a mobilecommunication system, operating frequency band positions at the time ofan idle mode of respective mobile station devices being arranged to bedistributed throughout a unique frequency bandwidth of a base stationdevice.

A third technical means is the mobile station device as defined in thesecond technical means, wherein the operating frequency band position atthe time of the idle mode is a certain frequency position calculated atleast from identification information of the mobile station device and aunique frequency bandwidth of the base station device.

A fourth technical means is the mobile station device as defined in thesecond technical means, wherein the operating frequency band position ofthe mobile station device is identified from the operating frequencyband position at the time of the idle mode.

A fifth technical means is the mobile station device as defined in thesecond technical means, wherein an indicator of an incoming call to agroup including the mobile station device or paging information to themobile station device is received at the operating frequency bandposition at the time of the idle mode.

A sixth technical means is the mobile station device as defined in thefirst technical means, wherein cell search information and broadcastinformation transmitted from the base station device are received at theoperating frequency band position.

A seventh technical means is the mobile station device as defined in thesecond technical means, wherein cell search information and broadcastinformation transmitted from the base station device are received at theoperating frequency band position at the time of the idle mode.

An eighth technical means is the mobile station device as defined in thesecond technical means, wherein during a reception period of cell searchinformation and broadcast information transmitted from the base stationdevice, the reception is performed at a frequency band position otherthan the operating frequency band position at the time of the idle mode.

A ninth technical means is the mobile station device as defined in thesecond technical means, wherein the operating frequency band position atthe time of the idle mode is also divided in the time directiondepending on the identification information.

A tenth technical means is the mobile station device as defined in thefirst or second technical means, wherein the identification informationis used at the time of an initial location registration process of themobile station device, and wherein after the location registration to ahigher-level network node, temporary identification information acquiredfrom the higher-level network node is used.

An eleventh technical means is the mobile station device as defined inthe fifth technical means, wherein the indicator is located as adownlink common control channel.

A twelfth technical means is the mobile station device as defined in thefifth technical means, wherein the indicator is located as a downlinkshared control signaling channel.

A thirteenth technical means is the mobile station device as defined inthe second technical means, wherein discontinuous reception is performedat the operating frequency band position at the time of the idle mode.

A fourteenth technical means is a base station device used in a mobilecommunication system, an operating frequency band position of a mobilestation device being a certain frequency position calculated at leastfrom identification information of the mobile station device, a uniquefrequency bandwidth of the mobile station device, and a unique frequencybandwidth of the base station device.

A fifteenth technical means is a base station device used in a mobilecommunication system, operating frequency band positions at the time ofan idle mode of respective mobile station devices being arranged to bedistributed throughout a unique frequency bandwidth of the base stationdevice.

A sixteenth technical means is the base station device as defined in thefifteenth technical means, wherein the operating frequency band positionat the time of the idle mode is a certain frequency position calculatedat least from identification information of the mobile station deviceand a unique frequency bandwidth of the base station device.

A seventeenth technical means is the base station device as defined inthe fifteenth technical means, wherein the operating frequency bandposition of the mobile station device is identified from the operatingfrequency band position at the time of the idle mode.

An eighteenth technical means is the base station device as defined inthe fifteenth technical means, wherein an indicator of an incoming callto a group including the mobile station device or paging information tothe mobile station device is transmitted at the operating frequency bandposition at the time of the idle mode.

A nineteenth technical means is the base station device as defined inthe fourteenth technical means, wherein cell search information andbroadcast information are transmitted at the operating frequency bandposition.

A twentieth technical means is the base station device as defined in thefifteenth technical means, wherein the base station device transmitscell search information and broadcast information at the operatingfrequency band position at the time of the idle mode.

A twenty-first technical means is the base station device as defined inthe fifteenth technical means, wherein the base station device transmitscell search information and broadcast information during a transmissionperiod of the cell search information and the broadcast information, ata frequency band position other than the operating frequency bandposition at the time of the idle mode.

A twenty-second technical means is the base station device as defined inthe fifteenth technical means, wherein the operating frequency bandposition at the time of the idle mode is also divided in the timedirection depending on the identification information. A twenty-thirdtechnical means is the base station device as defined in the fourteenthor fifteenth technical means, wherein the identification information isused at the time of an initial location registration process of themobile station device, and wherein after the location registration to ahigher-level network node, temporary identification information acquiredfrom the higher-level network node is used.

A twenty-fourth technical means is the base station device as defined inthe eighteenth technical means, wherein the indicator is located as adownlink common control channel.

A twenty-fifth technical means is the base station device as defined inthe eighteenth technical means, wherein the indicator is located as adownlink shared control signaling channel.

A twenty-sixth technical means is a mobile-station-device operatingfrequency band mapping method for mapping an operating frequency band ofa mobile station device in a mobile communication system, wherein theoperating frequency band position of the mobile station device iscalculated at least from identification information for identifying themobile station device, a unique frequency bandwidth of the mobilestation device, and a unique frequency bandwidth of a base stationdevice.

A twenty-seventh technical means is a mobile-station-device operatingfrequency band mapping method for mapping an operating frequency band ofa mobile station device in a mobile communication system, whereinoperating frequency band positions at the time of an idle mode ofrespective mobile station devices are arranged to be distributedthroughout a unique frequency bandwidth of a base station device.

A twenty-eighth technical means is the mobile-station-device operatingfrequency band mapping method as defined in the twenty-seventh technicalmeans, wherein at the time of the idle mode that is a standby state ofthe mobile station device, the operating frequency band position iscalculated at least from identification information for identifying themobile station device and a unique frequency bandwidth of the basestation device.

A twenty-ninth technical means is the mobile-station-device operatingfrequency band mapping method as defined in the twenty-seventh technicalmeans, wherein the operating frequency band position of the mobilestation device is identified from the operating frequency band positionat the time of the idle mode.

A thirtieth technical means is the mobile-station-device operatingfrequency band mapping method as defined in the twenty-seventh technicalmeans, wherein an indicator of an incoming call to a group including themobile station device or paging information to the mobile station deviceis received at the operating frequency band position at the time of theidle mode.

A thirty-first technical means is the mobile-station-device operatingfrequency band mapping method as defined in the twenty-sixth technicalmeans, wherein cell search information and broadcast informationtransmitted from the base station device are received at the operatingfrequency band position.

A thirty-second technical means is the mobile-station-device operatingfrequency band mapping method as defined in the twenty-seventh technicalmeans, wherein cell search information and broadcast informationtransmitted from the base station device are received at the operatingfrequency band position at the time of the idle mode.

A thirty-third technical means is the mobile-station-device operatingfrequency band mapping method as defined in the twenty-seventh technicalmeans, wherein during a reception period of cell search information andbroadcast information transmitted from the base station device, thereception is performed at a frequency band position other than theoperating frequency band position at the time of the idle mode.

A thirty-fourth technical means is the mobile-station-device operatingfrequency band mapping method as defined in the twenty-seventh technicalmeans, wherein the operating frequency band position at the time of theidle mode is also divided in the time direction depending onidentification information.

A thirty-fifth technical means is the mobile-station-device operatingfrequency band mapping method as defined in the twenty-sixth ortwenty-seventh technical means, wherein the identification informationis used at the time of an initial location registration process of themobile station device, and wherein after the location registration to ahigher-level network node, temporary identification information acquiredfrom the higher-level network node is used.

A thirty-sixth technical means is the mobile-station-device operatingfrequency band mapping method as defined in the thirtieth technicalmeans, wherein the indicator is located as a downlink common controlchannel.

A thirty-seventh technical means is the mobile-station-device operatingfrequency band mapping method as defined in the thirtieth technicalmeans, wherein the indicator is located as a downlink shared controlsignaling channel.

A thirty-eighth technical means is the mobile-station-device operatingfrequency band mapping method as defined in the twenty-seventh technicalmeans, wherein discontinuous reception is performed at the operatingfrequency band position at the time of the idle mode.

A thirty-ninth technical means is the mobile-station-device operatingfrequency band mapping method as defined in the twenty-seventh technicalmeans, wherein at the time of the idle mode, broadcast informationtransmitted from the base station device is located at respectiveoperating frequency band positions of the idle mode so as to be receivedat the operating frequency band position of the idle mode.

A fortieth technical means is a mobile station device used in a mobilecommunication system, the mobile station device including at leastidentification information of the mobile station device and informationindicating an available frequency bandwidth of the mobile station devicein a location registration request transmitted at the time of locationregistration of the mobile station device.

A forty-first technical means is a location management device used in amobile communication system, the location management device receiving alocation registration request from a mobile station device to manage alocation of the mobile station device, the location management devicemanaging at least identification information of the mobile stationdevice and available frequency bandwidth information of the mobilestation device.

A forty-second technical means is a mobile station device used in amobile communication system, the mobile station device including atleast identification information of the mobile station device andinformation indicating an operating frequency position of the mobilestation device in a location registration request transmitted at thetime of location registration of the mobile station device.

A forty-third technical means is a location management device used in amobile communication system, the location management device receiving alocation registration request from a mobile station device to manage alocation of the mobile station device, the location management devicemanaging at least identification information of the mobile stationdevice and the operating frequency position information of the mobilestation device.

A forty-fourth technical means is a location management device used in amobile communication system, the location management device transmittinga paging request to a base station device if an incoming call to amobile station device exists, the location management device includingat least identification information of the mobile station device andinformation indicating an available frequency bandwidth of the mobilestation device in the paging request.

A forty-fifth technical means is a base station device used in a mobilecommunication system, when receiving a paging request to a mobilestation device, the base station device transmitting the paging requestat an operating frequency position calculated at least fromidentification information of the mobile station device and an availablefrequency bandwidth of the mobile station device included in the pagingrequest.

A forty-sixth technical means is a mobile station device used in amobile communication system, the mobile station device receiving apaging request at an operating frequency position calculated at leastfrom identification information of the mobile station device and anavailable frequency bandwidth of the mobile station device.

A forty-seventh technical means is a location management device used ina mobile communication system, the location management devicetransmitting a paging request to a base station device if an incomingcall to a mobile station device exists, the location management deviceincluding at least identification information of the mobile stationdevice and information indicating an operating frequency band positionof the mobile station device in the paging request.

A forty-eighth technical means is a base station device used in a mobilecommunication system, when receiving a paging request to a mobilestation device, the base station device transmitting the paging requestat an operating frequency band position of the mobile station deviceincluded in the paging request.

A forty-ninth technical means is a location registration method of amobile station device in a mobile communication system, wherein alocation registration request transmitted by the mobile station deviceat the time of location registration of the mobile station deviceincludes at least identification information of the mobile stationdevice and information indicating an available frequency bandwidth ofthe mobile station device.

A fiftieth technical means is a location registration method of a mobilestation device in a mobile communication system, wherein a locationmanagement device receiving a location registration request from themobile station device to manage a location of the mobile station devicemanages at least identification information of the mobile station deviceand available frequency bandwidth information of the mobile stationdevice.

A fifty-first technical means is a location registration method of amobile station device in a mobile communication system, wherein alocation registration request transmitted by the mobile station deviceat the time of location registration of the mobile station deviceincludes at least identification information of the mobile stationdevice and information indicating an operating frequency position of themobile station device.

A fifty-second technical means is a location registration method of amobile station device in a mobile communication system, wherein alocation management device receiving a location registration requestfrom a mobile station device to manage a location of the mobile stationdevice manages at least identification information of the mobile stationdevice and the operating frequency position information of the mobilestation device.

A fifty-third technical means is a paging method in a mobilecommunication system, wherein a location management device transmittinga paging request to a base station device in the case of an incomingcall to a mobile station device includes at least identificationinformation of the mobile station device and information indicating anavailable frequency bandwidth of the mobile station device in the pagingrequest.

A fifty-fourth technical means is a paging method in a mobilecommunication system, wherein when receiving a paging request to amobile station device, a base station device transmits the pagingrequest at an operating frequency position calculated at least fromidentification information of the mobile station device and an availablefrequency bandwidth of the mobile station device included in the pagingrequest.

A fifty-fifth technical means is a paging method of a mobile stationdevice in a mobile communication system, wherein the mobile stationdevice receives a paging request at an operating frequency positioncalculated at least from identification information of the mobilestation device and an available frequency bandwidth of the mobilestation device.

A fifty-sixth technical means is a paging method in a mobilecommunication system, wherein a location management device transmittinga paging request to a base station device in the case of an incomingcall to a mobile station device includes at least identificationinformation of the mobile station device and information indicating anoperating frequency band position of the mobile station device in thepaging request.

A fifty-seventh technical means is a paging method in a mobilecommunication system, wherein when receiving a paging request to amobile station device, a base station device transmits the pagingrequest at an operating frequency band position of the mobile stationdevice included in the paging request.

A fifty-eighth technical means is a program for causing a computer toperform the mobile-station-device operating frequency band mappingmethod as defined in any one of the twenty-sixth to thirty-ninthtechnical means.

A fifty-ninth technical means is a program for causing a computer toperform the location registration method of a mobile station device asdefined in any one of the forty-ninth to fifty-second technical means orthe paging method as defined in any one of the fifty-third tofifty-seventh technical means.

A sixtieth technical means is a recording medium having recorded thereonthe program as defined in the fifty-eighth or fifty-ninth technicalmeans in a computer-readable manner.

EFFECT OF THE INVENTION

According to the present invention, a mobile station device, a basestation device, a mobile station device operating frequency band mappingmethod, and a program for executing the method and a recording mediumare provided which can efficiently use radio resources through thespecification of the operating frequency band positions adapted tomobile stations in different mobile station classes to improve thefrequency utilization efficiency of the overall communication system andwhich can efficiently execute the base station control of the operatingfrequency band position specification for a certain mobile station.

Particularly, an effective means is provided, which is related to thegrouping of mobile stations for specifying the operating frequency bandpositions of the mobile stations adapted to different frequencybandwidths (e.g., 1.25 MHz, 2.5 MHz, 5 MHz, 10 MHz, 20 MHz) andespecially to a grouping process for packet indicator PI (PacketIndicator) information indicating the presence or absence of a packetcall corresponding to AIPN (ALL Internet Protocol Network) requiring theEUTRA/EUTRAN.

According to the present invention, a mobile station device, a basestation device, a location management device, a mobile station devicelocation registration method, a paging method, and a program forexecuting the methods and a recording medium are provided which areadapted to a mobile communication system containing mobile stations withdifferent frequency bandwidth abilities (e.g., 1.25 MHz, 2.5 MHz, 5 MHz,1MHz, 2 MHz).

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a view for explaining an exemplary channel structure of theEUTRA.

FIG. 2 is a view of correlations between uplink/downlink channels of theEUTRA and the W-CDMA/HSDPA mode assumed based on the proposition of3GPP.

FIG. 3 is a view of state transition of a mobile station assumed basedon the proposition of 3GPP.

FIG. 4 is a view of an exemplary structure of a downlink radio frameassumed based on the proposition of 3GPP for the EUTRA.

FIG. 5 is a conceptual view of discontinuous reception operation whenthe mobile station is in the idle mode.

FIG. 6 is a view of another exemplary structure of the downlink radioframe assumed based on the proposition of 3GPP for the EUTRA.

FIG. 7 is a view of an exemplary structure of a base station related tothe present invention.

FIG. 8 is a view of an exemplary structure of a mobile station relatedto the present invention.

FIG. 9 is a view for explaining a first embodiment of the presentinvention.

FIG. 10 is a view for explaining location of a packet indicator for eachTTI.

FIG. 11 is a view of how the numbers are applied to candidates for theoperating frequency bands of mobile stations in different mobile stationclasses when the unique frequency bandwidths of the base station are 15MHz, 10 MHz, 5 MHz, and 2.5 MHz.

FIG. 12 is a view for explaining a calculating method of an operatingfrequency band position, an IM group, and a PI group.

FIG. 13 is another view for explaining the calculating method of theoperating frequency band position, the IM group, and the PI group.

FIG. 14 is yet another view for explaining the calculating method of theoperating frequency band position, the IM group, and the PI group.

FIG. 15 is a view of an example of structuring the operating frequencybands in an overlapped manner.

FIG. 16 is a flowchart for explaining a process when the mobile stationis powered on and transits to the idle mode.

FIG. 17 is a view for explaining a process when the mobile station ispowered on and transits to the idle mode.

FIG. 18 is a view for explaining an exemplary structure of a downlinkradio frame.

FIG. 19 is a view for explaining another exemplary structure of thedownlink radio frame.

FIG. 20 is a view for explaining yet another exemplary structure of thedownlink radio frame.

FIG. 21 is a view for explaining yet another exemplary structure of thedownlink radio frame.

FIG. 22 is a flowchart for explaining a process at the time of the idlemode.

FIG. 23 is a view for explaining a process at the time of the idle mode.

FIG. 24 is a flowchart for explaining a control process for an incomingpacket.

FIG. 25 is a view for explaining a control process for an incomingpacket.

FIG. 26 is a flowchart for explaining a control process at the time ofpacket transmission.

FIG. 27 is a view for explaining a control process at the time of packettransmission.

FIG. 28 is a view of yet another exemplary structure of the downlinkradio frame of the present invention.

FIG. 29 is a view of yet another exemplary structure of the downlinkradio frame of the present invention.

FIG. 30 is a view of yet another exemplary structure of the downlinkradio frame of the present invention.

FIG. 31 is a view of respective exemplary structures of a base station,a mobile station, and a location management device.

FIG. 32 is a view for explaining one embodiment of the presentinvention.

FIG. 33 is another view for explaining one embodiment of the presentinvention.

FIG. 34 is a view of explaining a numbering method of identifying theoperating frequency band position of the mobile station used at the timeof location registration and the time of paging.

FIG. 35 is a view for explaining an example of a procedure of locationregistration according to the present invention.

FIG. 36 is a view for explaining a procedure of paging according to thepresent invention.

FIG. 37 is a view for explaining an example of a conventional method ofspecifying the operating frequency band position.

FIG. 38 is a view for explaining a movement management method of theW-CDMA mode.

FIG. 39 is a view for explaining an example of a process procedure ofpaging.

EXPLANATION OF REFERENCE NUMERALS

10 . . . Node B; 20 . . . mobile station; 30 . . . SGSN; 31 . . . VLR,40 . . . location registration area, 50 . . . RNC; 100 . . . basestation; 101 . . . antenna portion; 102 . . . radio portion; 103 . . .demodulating portion; 104 . . . link channel estimating portion; 105 . .. control data extracting portion; 106 . . . channel decoding portion;107 . . . channel coding portion; 108 . . . control data insertingportion; 109 . . . OFDM modulating portion; 110 . . . schedulingportion; 111 . . . antenna portion; 112 . . . radio portion; 113 . . .control portion; 114 . . . communication IF; 200 . . . mobile station;201 . . . antenna portion; 202 . . . radio portion; 203 . . . OFDMdemodulating portion; 204 . . . link channel estimating portion; 205 . .. control data extracting portion; 206 . . . channel decoding portion;207 . . . channel coding portion; 208 . . . control data insertingportion; 209 . . . modulating portion; 210 . . . control portion; 211 .. . antenna portion; 212 . . . radio portion; 213 . . . control portion;300 . . . location management device; 301 . . . location managementdatabase; 302 . . . control portion; 303 . . . communication IF; and 400. . . location registration area.

PREFERRED EMBODIMENTS OF THE INVENTION

FIG. 1 is a view for explaining an exemplary channel structure of theEUTRA and shows an uplink/downlink exemplary channel structure assumedbased on the proposition of 3GPP for the EUTRA. A downlink physicalchannel of the EUTRA is made up of a downlink pilot channel DPCH(Downlink Pilot Channel), a downlink synchronization channel DSNCH(Downlink Synchronization Channel), a downlink common control channelDCCCH (Downlink Common Control Channel), and a downlink schedulingchannel DSCH (Downlink Scheduling Channel). The downlink schedulingchannel DSCH includes a downlink shared control signaling channel DSCSCH(Downlink Shared Control Signaling Channel) and a downlink shared datachannel DSDCH (Downlink Shared Data Channel).

An uplink physical channel of the EUTRA is made up of an uplinkcontention-based channel UCBCH (Uplink Contention-based Channel) and anuplink scheduling channel USCH (Uplink Scheduling Channel).

The outline of the downlink channels and the uplink channels of theEUTRA will then briefly be described. FIG. 2 is a view of correlationsbetween the uplink/downlink channels of the EUTRA and the W-CDMA/HSDPAmode assumed based on the proposition of 3GPP.

In the downlink of the EUTRA, the downlink pilot channel DPCH includes adownlink common pilot channel DCPCH (Downlink Common Pilot Channel) anda downlink dedicated pilot channel DDPCH (Downlink Dedicated PilotChannel).

The downlink common pilot channel DCPCH corresponds to the pilot channelCPICH of the W-CDMA mode and is used for estimation of a downlinkpropagation path status in the AMCS mode, cell search, and propagationpath loss measurement in the uplink transmission power control. Thedownlink dedicated pilot channel DDPCH is transmitted to individualmobile stations from an antenna having a propagation path (directivity)different from a cell shared antenna, such as an adaptive array antennaor can be used for the purpose of reinforcing the downlink common pilotchannel DCPCH for a mobile station with lower reception quality.

The downlink synchronization channel DSNCH corresponds to thesynchronization channel SCH of the W-CDMA mode and is used for cellsearch of mobile stations, a radio frame of the OFDM signal, a timeslot, a transmission timing interval TTI (Transmission Timing Interval),and OFDM symbol timing synchronization.

The downlink common control channel DCCCH includes common controlinformation, such as broadcast information (corresponding to thebroadcast channel BCH) corresponding to the primary common controlphysical channel P-CCPCH and the paging indicator channel PICH of theW-CDMA mode and packet indicator PI information indicating the presenceor absence of a packet call (corresponding to the paging indicatorchannel PICH).

The downlink scheduling channel DSCH is made up of a downlink sharedcontrol signaling channel DSCSCH (Downlink Shared Control SignalingChannel) and a downlink shared data channel DSDCH (Downlink Shared DataChannel).

The downlink shared control signaling channel DSCSCH corresponds to theHS-DSCH-related shared control channel HS-SCCH included in thehigh-speed physical downlink shared channel HS-PDSCH of the HSDPA mode,the downlink dedicated control channel DPCCH, and the acquisitionindicator channel AICH, is shared by a plurality of mobile stations, andis used for transmitting to the mobile stations the informationnecessary for demodulation of the high-speed downlink shared channelHS-DSCH (such as a modulation mode and a spread code), the informationnecessary for the error correction decoding process and the HARQprocess, the scheduling information of radio resources (frequency andtime), etc. A portion of packet paging information and downlink accessinformation corresponding to the paging channel PCH included in thesecondary common control physical channel of the W-CDMA mode is alsotransmitted as the downlink shared control signaling channel DSCSCH.

The downlink shared data channel DSDCH corresponds to the high-speeddownlink shared channel HS-DSCH included in the high-speed physicaldownlink shared channel HS-PDSCH of the HSDPA mode and the downlinkdedicated data channel DPDCH and is used for transmitting packet dataaddressed to a mobile station from a higher-level layer. A portion ofpacket paging information and downlink access information correspondingto the paging channel PCH included in the secondary common controlphysical channel of the W-CDMA mode is also transmitted as data of thedownlink shared data channel DSDCH.

In the uplink, the uplink contention-based channel UCBCH includes a fastaccess channel FACH (Fast Access Channel), a reservation channel RCH(Reservation Channel), and an uplink synchronization channel USNCH(Uplink Synchronization Channel). The uplink contention-based channelUCBCH corresponds to the random access channel RACH (Random AccessChannel) of the W-CDMA mode.

The uplink scheduling channel USCH is made up of an uplink shared datachannel USDCH (Uplink Shared Data Channel) and an uplink shared controlsignaling channel USCSCH (Uplink Shared Control Signaling Channel). Theuplink shared data channel USDCH corresponds to the uplink dedicatedcontrol channel DPDCH of the W-CDMA mode, is shared by the mobilestations, and is used for the packet data transmission of the mobilestations. The uplink shared control signaling channel USCSCH correspondsto the HS-DSCH-related uplink dedicated physical control channelHS-DPCCH and the dedicated control channel DPDCH of the HSDPA mode, isshared by the mobile stations, and is used for transferring downlinkchannel propagation path quality information CQI (Channel QualityIndicator), feedback information such as HARQ, uplink pilot and uplinkchannel control information, etc., of the mobile stations.

The EUTRA will be described with regard to a flow oftransmission/reception of a packet call of the mobile station assumedbased on the proposition of 3GPP.

First, FIG. 3 shows state transitions of the mobile station assumedbased on the proposition of 3GPP. After power-on (10), the mobilestation performs the selection/reselection of public mobilecommunication PLMN (Public Land Mobile Network) and the cell selection(11). The mobile station also receives location registration update andbroadcast information (12) and transits to an idle mode, which is thestandby state (13). In the idle mode, the cell selection/reselection isperformed.

If an incoming packet (17) exists from the base station to the mobilestation, the mobile station receives the packet paging indicator PIinformation indicating the presence or absence of the packet call andthe packet paging information corresponding to the packet call, transitsthrough a packet communication process procedure to an active mode (15)during which the packet communication is in progress, andtransmits/receives the packet data. If no packet data aretransmitted/received for a period longer than a timer (e.g., timeinterval of Tinact) provided on the mobile station or the base station,the mobile station returns to the idle mode (or also referred to asinactive mode) (13). The cell selection/reselection is also performed inthe active mode (15).

If an outgoing packet (14) from a user exists, the mobile stationtransits to the packet communication in progress (15) through receptionof the downlink access information (corresponding to the downlink accesschannel FACH), transmission of the uplink access information(corresponding to the random access channel RACH), and the packetcommunication process procedure.

FIG. 4 is a view of an exemplary structure of a downlink radio frameassumed based on the proposition of 3GPP for the EUTRA. The downlinkradio frame is two-dimensionally made up of Chunks, which are clustersof a plurality of sub-carriers on the frequency axis and thetransmission timing interval TTI on the time axis. The Chunk is made upof a cluster of several sub-carriers. For example, on the frequencyaxis, if the entire spectrum (downlink frequency bandwidth) B5 of thedownlink is 20 MHz; the frequency bandwidth Bch of the chunk is 1.25MHz; and the sub-carrier frequency bandwidth Bsc is 12.5 kHz, the frameincludes 16 Chunks and 100 sub-carriers for each Chunk, i.e., a total of1600 sub-carriers for the downlink. On the time axis, if one radio frameis 10 ms and TTI is 0.5 ms, 20 TTIs are included.

That is, in the above example, one radio frame includes 16 Chunks and 20TTIs, and one TTI includes a plurality of OFDM symbol lengths (Ts).Therefore, in this example, a minimum radio resource available for themobile station is made up of one Chunk (100 sub-carriers) and one TTI(0.5 ms). The radio resource of one Chunk may further finely be divided.The TTI may be 0.67 ms, 0.625 ms, etc.

As shown in FIG. 4, the downlink common pilot channel DCPCH is mapped atthe beginning of each TTI and the downlink dedicated pilot channel DDPCHis mapped at a suitable position of one TTI (e.g., mapped at the centerportion of TTI) depending on the usage status of the antenna of the basestation or the propagation path status of the mobile station.

The downlink common control channel DCCCH and the downlinksynchronization channel DSNCH are mapped in the TTI at the beginning ofthe radio frame. Since these channels are mapped in the TTI at thebeginning of the radio frame, when the mobile station is in the idlemode, the mobile station can receive common control information such ascell search, timing synchronization and broadcast information and packetpaging information by receiving only the TTI at the beginning of theradio frame or several OFDM symbol lengths (Ts) of the TTI at thebeginning of the radio frame.

In the case of the idle mode, the mobile station performs thediscontinuous reception operation.

FIG. 5 is a conceptual view of the discontinuous reception operationwhen the mobile station is in the idle mode. FIG. 5(A) shows the samefigure as the structure of the downlink radio frame assumed based on theproposition of 3GPP of FIG. 4, and FIG. 5(B) shows an image of thediscontinuous reception operation in accordance with FIG. 5(A).

As shown in FIG. 5, when the mobile station is in the idle mode, thediscontinuous operations include a discontinuous operation 1 and adiscontinuous operation 2, for example.

The discontinuous operation 1 is a discontinuous reception method ofturning on a receiving portion for the TTI1 period at the beginning ofthe frame and turning off the receiving portion for other periods. Thediscontinuous operation 2 is a discontinuous reception method of turningon the receiving portion for the periods of the downlink common pilotchannel DCPCH, the downlink common control channel DCCCH, the downlinkshared control signaling channel DSCSCH, and the downlinksynchronization channel DSNCH of the TTI1 at the beginning of the frame(several OFDM symbols Ts) and turning off the receiving portion forother periods. Although FIG. 5 shows an example of turning on thereceiving portion for the TTI1 period of each beginning of the frame,the receiving portion may be turned on for every plurality of frameintervals.

The downlink shared control signaling channel DSCSCH is mapped at thebeginning portion of each TTI as is the case with the downlink commonpilot CPICH. Even while the mobile station performs the packetcommunication, if no packet data addressed to the own station exist inthe TTI, the discontinuous reception can be performed to receive onlythe downlink shared control signaling channel DSCSCH.

Although FIG. 4 shows that the downlink pilot channel DPCH (the downlinkcommon pilot channel DCPCH and the downlink dedicated pilot channelDDPCH), the downlink common control channel DCCCH, the downlink sharedcontrol signaling channel DSCSCH, and the downlink synchronizationchannel DSNCH are serially mapped between the sub-carriers on thefrequency axis, the channels may discontinuously be mapped by thinningout between the sub-carriers.

FIG. 6 is a view of another exemplary structure of the downlink radioframe assumed based on the proposition of 3GPP for the EUTRA. Forexample, as shown in FIG. 6, the downlink common pilot channel DCPCH,the downlink common control channel DCCCH, and the downlink sharedcontrol signaling channel DSCSCH may be arranged in staggeredsub-carriers instead of the structure of FIG. 4.

Although each of the above downlink channels is shown as an example ofusing TDM for the entire downlink frequency band, CDM (Code DivisionMultiplexing), FDM, or a combination of TDM and FDM may be used.

Although each of the downlink channels indicates one OFDM symbol length(Ts), a plurality of OFDM symbol lengths (Ts) may be used depending onan information amount.

The downlink shared data channel DSDCH transmits packet data addressedto the mobile stations based on the AMCS mode. By way of example, asshown in FIG. 1, the channel is allocated to mobile stations MS1, MS2,and MS3 depending on the propagation path statuses of the mobilestations.

FIGS. 7 and 8 are views of respective exemplary structures of a basestation and a mobile station related to the present invention. In FIG.7, a base station 100 is made up of an antenna portion 101, a radioportion 102, a demodulating portion 103, an uplink channel estimatingportion 104, a control data extracting portion 105, a channel decodingportion 106, a channel coding portion 107, a control data insertingportion 108, an OFDM modulating portion 109, and a scheduling portion110.

In FIG. 8, a mobile station 200 is made up of an antenna portion 201, aradio portion 202, an OFDM demodulating portion 203, a downlink channelestimating portion 204, a control data extracting portion 205, a channeldecoding portion 206, a channel coding portion 207, a control datainserting portion 208, a modulating portion 209, and a control portion210.

A principle of operation of the base station 100 and the mobile station200 assumed based on the proposition of 3GPP will briefly be describedwith reference to FIGS. 7 and 8.

In the base station 100, if the base station 100 receives packet data(including the subscriber identification information, for example, IMSI(International Mobile Subscriber Identity), IMEI (International MobileEquipment Identity), TMSI (Temporary Mobile Subscriber Identity), TMEI(Temporary Mobile Equipment Identity), and IP address) addressed to themobile station 200 from a higher-level network node (e.g., SGSN (ServingGPRS Support Node) or RNC (Radio Network Control) of the W-CDMA mode,not shown), the packet data are stored in a base-station transmissiondata buffer (not shown). The downlink transmission data from thetransmission data buffer are input to the channel coding portion 107;the channel coding portion 107 inputs the output signals from thescheduling portion 110, i.e., downlink AMC information such as adownlink AMC mode and downlink mobile station allocation information(downlink scheduling information), uses the AMC mode defined by thedownlink AMC information (e.g., turbo code, encoding rate 2/3) toexecute the encoding process for the downlink transmission data; and theoutput thereof is input to the control data inserting portion 108.

The downlink control data include control data for the downlink pilotchannel DPCH, the downlink common control channel DCCCH, and thedownlink synchronization channel DSNCH. The downlink control data areinput to the control data inserting portion 108 and the control datamapping is performed for the downlink common control channel DCCCH shownin FIG. 1. The packet indicator PI information is mapped on the downlinkcommon control channel DCCCH in a specified or calculated frequencybandwidth (or mapped on the shared signal control channel SCSCH in somecases).

On the other hand, the downlink AMC information (such as AMC mode anddownlink scheduling information) determined by the scheduling portion110 is input to the control data inserting portion 108 and the controldata mapping is performed for the downlink shared control signalingchannel DSCSCH.

The output of the control data inserting portion 108 is sent to the OFDMmodulating portion 109 along with the downlink common control channelDCCCH, the downlink shared control signaling channel DSCSCH, and thedownlink shared data channel DSDCH mapped thereon. The OFDM modulatingportion 109 performs the data modulation, the serial/parallel conversionof the input signal, and the multiplication of the spread code and thescrambling code and executes the OFDM signal process such as IFFT(Inverse Discrete Fourier Transform), CP (Cyclic Prefix) insertion, andfiltering to generate the OFDM signal. The OFDM modulating portion 109inputs the downlink AMC information from the scheduling portion 110 tocontrol the data modulation (e.g., 16QAM) of the sub-carriers. The radioframe shown in FIG. 4 is generated and converted to the RF (RadioFrequency) frequency band by a transmission circuit of the radioportion, and the downlink signal is transmitted from the antennaportion.

On the other hand, the uplink signal sent from the mobile station 200 isreceived by the antenna portion 101, converted from the RF frequency toIF or directly to the base band by a reception circuit of the radioportion, and input to the demodulating portion 103. The uplink signalmay be an OFDM signal, an MC-CDMA (Multi-Carrier-CDMA) signal, or asingle carrier SC signal and a VSCRF-CDMA (Variable Spreading and ChipRepetition Factors-CDMA) signal for reducing PAPR (see, e.g., patentdocument 2(Japanese Laid-Open Patent Publication No. 2004-197756,“Mobile Station, Base Station, and Wireless Transmission Program andMethod”)).

The uplink channel estimating portion 104 uses the uplink pilot channelUPCH to estimate the propagation path quality of the individual uplinkchannels of the mobile stations and calculates the uplink propagationpath quality information CQI. The calculated uplink CQI information isinput to the scheduling portion 110. The uplink AMC information such asuplink AMC mode and uplink scheduling information is input to thecontrol data inserting portion 108, mapped on the downlink sharedcontrol signaling channel DSCSCH, and transmitted to the correspondingmobile station 200.

The corresponding mobile station 200 transmits packet data with thedetermined uplink AMC mode and uplink scheduling information inaccordance with the uplink AMC information that is output from thescheduling portion 110. The uplink signal of the packet data is input tothe demodulating portion 103 and the channel decoding portion 106. Onthe other hand, the uplink AMC information output from the schedulingportion 110 is input to the demodulating portion and the channeldecoding portion 106, and the demodulation (e.g., QPSK) and decodingprocess (e.g., convolution coding, encoding rate 2/3) is executed forthe uplink signal in accordance with this information.

The control data extracting portion 105 extracts control information ofthe uplink contention-based channel UCBCH and the uplink shared controlsignaling channel USCSCH. The control data extracting portion 105extracts the downlink channel propagation path quality information CQIof the mobile station 200 sent through the uplink shared controlsignaling channel USCSCH and inputs the information to the schedulingportion 110 to generate the downlink AMC information.

The scheduling portion 110 receives input of the uplink CQI informationfrom the uplink channel estimating portion 104, input of the downlinkCQI information feedback by the mobile station 200 from the control dataextracting portion 105, and input of the downlink/uplink transmissiondata buffer information, the uplink/downlink QoS (Quality of Service)information, various pieces of service class information, the mobilestation class information, and the subscriber identification informationof the mobile stations from a base station control portion (not shown).

The scheduling portion 110 integrates these pieces of input information,generates the uplink/downlink AMC information in accordance with theselected scheduling algorithm at the specified or calculated centerfrequency, and outputs the information to the portions shown in FIG. 7to implement the transmission scheduling of the packet data.

The mobile station 200 receives the downlink OFDM signal with theantenna portion 201, converts the downlink reception signal from the RFfrequency to IF or directly to the base band with a local RF frequencyoscillation circuit (synthesizer), a down converter, a filter, anamplifier, etc., of the radio portion 202, and inputs the signal to theOFDM demodulating portion 203. The downlink channel estimating portion204 uses the downlink pilot channel DPCH (uses the downlink common pilotchannel DCPCH, the downlink dedicated pilot channel DDPCH, or acombination of both) to estimate the propagation path quality of theindividual downlink channels of the mobile stations and calculates thedownlink propagation path quality information CQI. The calculateddownlink CQI information is input to the control data inserting portion208, mapped on the uplink shared control signaling channel USCSCH, andtransmitted to the base station 100.

The OFDM demodulating portion 203 performs CP (Cyclic Prefix) removal ofinput signal, FFT (Discrete Fourier Transform), and the multiplicationof the spread code and the scrambling code, executes the OFDM signaldemodulation process such as the parallel/serial conversion, datademodulation, and filtering to generate the demodulation data, which areinput to the control data extracting portion 205.

The control data extracting portion 205 extracts the downlink channelcontrol information (such as packet indicator PI information, packetpaging information, downlink access information, and broadcastinformation) other than the downlink shared data channel DSDCH (theinformation is mapped on the downlink shared signaling control channelSCSCH in some cases). The downlink AMC information is extracted such asthe downlink AMC mode and the downlink scheduling information mapped onthe downlink shared control signaling channel DSCSCH and is output tothe OFDM demodulating portion 203 and the channel decoding portion 206.The uplink AMC information is extracted such as the uplink AMC mode andthe uplink scheduling information mapped on the downlink shared controlsignaling channel DSCSCH and is output to the modulating portion 209 andthe channel coding portion 207.

The OFDM demodulating portion 203 uses the AMC mode (e.g., 16QAM)defined by the downlink AMC information to demodulate the sub-carriers.The channel decoding portion uses the AMC mode (e.g., turbo code,encoding rate 2/3) defined by the downlink AMC information to decode thepacket data addressed to the own station, which are mapped on thedownlink shared data channel DSDCH.

The channel coding portion 207 inputs the uplink transmission data thatare individual packet data of the mobile station 200, uses the downlinkAMC information (e.g., convolution coding, encoding rate 2/3) outputfrom the control data extracting portion 205 to encode the data, whichare output to the control data inserting portion 208.

The control data inserting portion 208 maps the downlink CQI informationfrom the downlink channel estimating portion 204 onto the uplink sharedcontrol signaling channel USCSCH included in the uplink schedulingchannel USCH and maps the uplink contention-based channel UCBCH and theuplink scheduling channel USCH onto the uplink transmission signal.

The modulating portion 209 uses the downlink AMC information (e.g.,QPSK) output from the control data extracting portion 205 to performdata modulation and outputs the signal to a transmission circuit of theradio portion 202. The uplink signal may be modulated with the use ofthe OFDM signal, the MC-CDMA signal, or the single carrier SC signal andthe VSCRF-CDMA signal for reducing PAPR.

The control portion 210 has the mobile station class information, theunique frequency bandwidth information, and the subscriberidentification information. The control portion 210 sends a controlsignal causing a shift to the specified or calculated center frequencyto the radio portion 202 and performs the shift to the center frequencywith the local RF frequency oscillation circuit (synthesizer) of theradio portion 202.

A base band signal is converted to the RF frequency band by the local RFfrequency oscillation circuit (synthesizer), an upconverter, a filter,and an amplifier of the radio portion 202 and the uplink signal istransmitted from the antenna portion 201. The radio portion 202 includesIF and RF filters corresponding to the above different frequencybandwidths (e.g., 1.25 MHz, 2.5 MHz, 5 MHz, 10 MHz, 20 MHz).

FIG. 9 is a view for explaining a first embodiment of the presentinvention. The first embodiment proposes a method of specifying anoperating frequency band position of a mobile station for containingwithin the unique frequency bandwidth of the base station device themobile stations in the different mobile station classes assumed based onthe proposition of 3GPP for the EUTRA. The operating frequency band ofthe mobile station is a frequency band used by at least the mobilestation in the active mode for transmitting/receiving packets.

In FIG. 9, when the unique frequency bandwidth of the base station is 20MHz, numbers are applied to the downlink frequency bands used by therespective mobile stations in the different mobile station classes. Astructure will hereinafter be described for the numbers allocated to theoperating frequency bands of the mobile stations. In the structure shownin FIG. 9, it is assumed that the operating frequency bands of themobile stations do not overlap.

The operating frequency band position of the mobile station in the20-MHz or 15-MHz mobile station class is inevitably determined sinceonly one option exists as shown in FIG. 9. The operating frequency bandposition of the mobile station in the 10-MHz mobile station class hastwo candidates (Nos. 0 and 1 (binary number representation)), and theoperating frequency band position of the mobile station in the 5-MHzmobile station class has four candidates (Nos. 00, 01, 10, and 11). Theoperating frequency band position of the mobile station in the 2.5-MHzmobile station class has eight candidates (Nos. 000 to 111), and theoperating frequency band position of the mobile station in the 1.25-MHzmobile station class has 16 candidates (Nos. 0000 to 1111).

The mobile stations in the respective mobile station classes are shiftedto suitable frequency positions selected from the above candidates ofthe operating frequency band. The frequency band positions of the mobilestations should fairly be selected without a bias in consideration ofthe frequency utilization efficiency.

Since individual information is not exchanged between the base stationand the mobile station at the time of the idle mode, the base stationcannot comprehend the operating frequency band position of the idle-modemobile station contained in the own station. Therefore, when notifyingthe mobile station of an incoming packet at the start of the downlinkcommunication, the base station does not know what frequency band shouldbe used for transmitting the paging information. Although this can besolved if all the mobile stations in the idle mode receive the paginginformation in the same predetermined frequency band, since the mobilestations in all the mobile station classes transmit/receive the paginginformation and the specification information of the operating frequencyband position in a certain frequency band, traffics are increased in thecertain frequency band, resulting in reduction in the frequencyutilization efficiency.

Even if the operating frequency bands are arranged such that certainfrequency bands are used by respective mobile station classes, trafficsin a certain frequency band are not improved when all the mobilestations within the base station are in the 1.25-MHz mobile stationclass, for example. Therefore, the operating frequency band positionsshould be selected in such a method of reducing a communication trafficamount of the paging information and the shift position specificationinformation at the start of the downlink communication.

Similarly, the mobile station does not know what frequency band shouldbe used for transmitting the contention-based access at the start of theuplink communication. Although this can be solved if all the mobilestations in the idle mode perform the contention-based access in thesame predetermined frequency band, since all the mobile stations performthe contention-based access in a certain frequency band, a collisionfrequency is increased in the certain frequency band. Therefore, theoperating frequency band positions should be selected in such a methodof reducing the collision frequency of the contention-based access atthe start of the uplink communication.

If the mobile stations always receive the downlink signals in thefrequency bandwidths determined in the mobile station classes in theidle mode, this is inefficient in power consumption for the mobilestation in the mobile station class having a greater frequency band.Since the reception signal should be received by the mobile station inthe 1.25-MHz mobile station class at the time of the idle mode, themobile stations in the mobile station classes equal to or greater than1.25 MHz should also receive only the 1.25-MHz bandwidth signals tonarrow down the reception bandwidth and reduce the power consumption.

Therefore, a plurality of mobile stations is grouped that have the samefrequency band position of receiving the downlink signals at the time ofthe idle mode and is referred to as an IM group (idle mode group). It isassumed here that each IM group receives a frequency bandwidth of 1.25MHz. The frequency band received by the IM group is defined as anoperating frequency band at the time of the idle mode. The frequencyband position of the IM group is included in the operating frequencyband. The IM group includes different mobile station classes. Since thebandwidth received by the IM group is 1.25 MHz, the numbers for theoperating frequency band candidates of the 1.25-MHz mobile station classcan also be used as the number indicating the IM groups.

A plurality of mobile stations belonging to the same IM group is groupedinto an incoming packet group and is referred to as a PI group (packetindicator group). If a mobile station belonging to a PI group #n isnotified of the presence of an incoming call to the PI group #n throughthe packet indicator PI, the mobile station receives the downlink sharedcontrol signaling channel DSCSCH and the downlink shared data channelDSDCH to check whether an incoming packet addressed to the own stationexists.

For example, a number 010100010 shown in FIG. 9 indicates that a mobilestation in the 5-MHz mobile station class belongs to an operatingfrequency band position of 01, an IM group of 0101, and a PI group of00010.

Due to the grouping in the reception frequency area of the downlinksignals at the time of the idle mode, the mobile stations in the idlemode receive signals in a narrower frequency bandwidth and the powerconsumption can be reduced.

By combining and more finely dividing the grouping in the frequencydomain and the grouping in the time domain (FDM/TDM), the receptionfrequency/time positions of the mobile stations in the idle mode can bedistributed. As a result, the mobile stations in the idle mode receivesignals in narrow ranges in both frequency and time and the powerconsumption can considerably be reduced. This can be implemented byfurther dividing the IM group and arranging the packet indicator PI foreach TTI, for example. Specifically, a bit indicating a TTI position ina frame may be added to the IM group number as shown in FIG. 10.

FIG. 11 is a view of how the numbers are applied to candidates for theoperating frequency bands of mobile stations in different mobile stationclasses when the unique frequency bandwidths of the base station are 15MHz, 10 MHz, 5 MHz, and 2.5 MHz; FIG. 11(A) shows the case that theunique frequency bandwidth of the base station is 15 MHz; FIG. 11(B)shows the case that the unique frequency bandwidth of the base stationis 10 MHz; FIG.

11(C) shows the case that the unique frequency bandwidth of the basestation is 5 MHz; and FIG. 11(D) shows the case that the uniquefrequency bandwidth of the base station is 2.5 MHz. By applying thenumbers corresponding to the unique frequency bandwidths of the basestation as above, the unique frequency bandwidths of the base stationcan flexibly be accommodated.

To perform the above specification without communication between thebase station and the mobile station, the subscriber identificationinformation identifying the mobile station is utilized which is retainedby both the base station and the mobile station at the time of anincoming packet. The subscriber identification information is IMSI,TMSI, IMEI, TMEI used in the W-CDMA mode or information for identifyinga subscriber or terminal such as an IP address allocated to a mobilestation. By way of example, description will be made here based on IMSI.

The operating frequency band position, the IM group, and the PI groupare calculated from the subscriber identification information IMSI(IMSI=1, 2, 3, . . . , n), the unique frequency bandwidth MBnb (Node BMaximum Band, MBnb=1.25, 2.5, 5, 10, 20 MHz) of the base station, andthe unique frequency bandwidths Bn of the mobile stations.

FIG. 12 is a view for explaining a calculating method of the operatingfrequency band position, the IM group, and the PI group.

It is assumed here that the subscriber identification information isIMSI=101010010100010 (binary number representation), that the uniquefrequency bandwidth of the mobile station is Bn=5 MHz, that the uniquefrequency bandwidth of the base station is MBnb=20 MHz, and that thebandwidth received by the IM group is Bim=1.25 MHz. Calculations arethen made for an operating frequency band position number Ps identifyingthe operating frequency band position, an IM group number Pimidentifying the IM group, and a PI group number Ppi identifying the PIgroup. The number of PI groups Npi included in the bandwidth Bimreceived by the IM group is 32. The total number of the PI groupsincluded in the 20-MHz bandwidth is 512.

The highest two bits of 010100010 calculated through the calculation ofthe subscriber identification information IMSI mod 512 indicate that theoperating frequency band position number Ps is 01 of the 5-MHz band; thehighest four bits indicate that the IM gourp number Pim is 0101; and thelowest five bits indicate that the PI group number Ppi is 00010.

The calculating equations generalizing the above processes are asfollows.

number of IM groups (Nim)=MBnb (MHz)/Bim(MHz)  (Eq. 1)

number of IM groups in operating frequency band position (Nim_s)=Bn(MHz)/Bim (MHz)  (Eq. 2)

PI group number (Ppi)=IMSI mod Npi  (Eq. 3)

IM group number (Pim)=IMSI/Npi mod Nim  (Eq. 4)

number of candidates for operating frequency band position(Ns)=MBnb/Bn  (Eq. 5)

operating frequency band position number (Ps)=IMSI/(Npi×Nim_s)modNs  (Eq. 6)

However, if the IM groups at the time of the idle mode are arranged inthe FDM/TDM arrangement, when the number of TTI in the frame is Ntti=20,the equations are as follows.

time-direction IM group number (Pim_t)=IMSI/Npi/Nim mod Ntti,

FDM/TDM IM group number (Pim_ft)=Pim×Pim_t.

FIG. 13 is another view for explaining the calculating method of theoperating frequency band position, the IM group, and the PI group andshows the calculating method when the subscriber identificationinformation is IMSI=101010010100010 (binary number representation); theunique frequency bandwidth of the mobile station is Bn=5 MHz; the uniquefrequency bandwidth of the base station is MBnb=15 MHz; and the numberof PI groups is Npi=32. In this case, when using the above equations,the operating frequency band position number, the IM group number, andthe PI group number are as follows.

number of IM groups (Nim)=15/1.25=12   (Eq. 7)

number of IM groups in operating frequency band position(Nim_s)=5/1.25=4  (Eq. 8)

PI group number (Ppi)=21666 mod 32=00010   (Eq. 9)

IM group number (Pim)=21666/32 mod 12=0101   (Eq. 10)

number of candidates for operating frequency band position (Ns)=15/5=3  (Eq. 11)

operating frequency band position number (Ps)=21666/(32×4) mod 3=01  (Eq. 12)

FIG. 14 is yet another view for explaining the calculating method of theoperating frequency band position, the IM group, and the PI group andshows the calculating method when the subscriber identificationinformation is IMSI=101010010100100 (binary number representation); theunique frequency bandwidth of the mobile station is Bn=15 MHz; theunique frequency bandwidth of the base station is MBnb=20 MHz; and thenumber of PI groups is Npi=32. In this case, when using the aboveequations, the operating frequency band position number, the IM groupnumber, and the PI group number are as follows.

number of IM groups (Nim)=20/1.25=16   (Eq. 13)

number of IM groups in operating frequency band position(Nim_s)=15/1.25=12  (Eq. 14)

PI group number (Ppi)=21540 mod 32=00100   (Eq. 15)

IM group number (Pim)=21540/32 mod 16=0001   (Eq. 16)

number of candidates for operating frequency band position (Ns)=20/15=1  (Eq. 17)

operating frequency band position number (Ps)=21540/(32×4) mod 1=0  (Eq. 18)

If the base-station unique frequency bandwidth MBnb is 20 MHz and themobile-station unique frequency bandwidth Bn is 15 MHz, the frequencyband corresponding to the remaining 5 MHz cannot be used by the mobilestation. For example, if the operating frequency band position of themobile station in the 15-MHz mobile station class is fixed to the centerof the base-station unique frequency bandwidth of 20 MHz as shown inFIG. 9, the IM group position may correspond to right and left 2.5-MHzbands unusable for the mobile stations in the case of the abovecalculating method. A means of avoiding this situation may be a methodof performing calculations with the base-station unique frequencybandwidth MBnb set to 15 MHz and using a number sequence for thebase-station unique frequency bandwidth of 15 MHz shown in FIG. 11(A) tospecify the IM group position.

In another method, the operating frequency band position of the mobilestation in the 15-MHz mobile station class is made variable such thatthe position can be shifted from the center frequency of 15 MHz to theright or left by 2.5 MHz. As shown in FIG. 14, five candidates a to efor the mobile-station operating frequency band position are availableand the operating frequency band position is selected in accordance withthe IM group number. As a result, the base station having the uniquefrequency bandwidth of 20 MHz can efficiently arrange the mobilestations in the 15-MHz mobile station class.

The above method is applicable to the mobile stations in the classesother than the 15-MHz mobile station class. The operating frequencybands can flexibly be configured by correlating and prescribing the IMgroup numbers and the operating frequency bands without fixing thestructures of the 15-MHz, 10-MHz, 5-MHz, and 2.5-MHz operating frequencybands. For example, in the case of the mobile stations in the 5-MHzmobile station class, the operating frequency bands may be structured inan overlapping manner as shown in FIG. 15.

The calculated operating frequency band position number (Ps) can be usedfor calculating an uplink/downlink RF center frequency and channelnumber UARFCN (UTRA Absolute Radio Frequency Channel Number, (non-patentdocument 6); 3GPP TS 25.101, V6.8.0 (2005-06), User Equipment (UE) radiotransmission and reception (FDD),http://www.3gpp.org/ftp/Specs/html-info/25-series.htm) of the radioportion 102 of the base station device and the radio portion 202 of themobile station.

First, the minimum frequency DL_NBfmin of the downlink bandwidth of themobile station is calculated with the unique frequency bandwidth MBnb ofthe base station and the downlink center frequency NBfc of the basestation.

DL_NBfmin=NBfc−MBnb/2   (Eq. 19)

The center frequency DL_Fs of the downlink operating frequency band ofthe mobile station and the IM group center frequency DL_Fim are thencalculated.

DL_Fs=NBfmin+Bn·(2Ps+1)/2 (MHz)  (Eq. 20)

DL_Fim=NBfmin+Bim·(2Pim+1)/2 (MHz)  (Eq. 21)

For example, in the case of the base-station unique frequency bandwidthMBnb=20 MHz and the base-station downlink center frequency NBfc=2144.9MHz, the minimum frequency DL_NBfmin of the downlink operating frequencyband of the mobile station is as follows.

DL_NBfmin=NBfc−MBnb/2=2144.9−20/2=2134.9 MHz  (Eq. 26)

In the case of FIG. 12, the center frequency DL_Fs of the downlinkoperating frequency band of the mobile station and the IM group centerfrequency DL_Fim are as follows (Bn=5 MHz, MBnb=20 MHz, Bim=1.25 MHz,Npi=32, Ps=1, Pim=5, Ppi=2, Nim=16, Nim_s=4, Ns=4),

DL_Fs=NBfmin+Bn·(2Ps+1)/2=2134.9+5×(2+1)/2=2142.4 (MHz)  (Eq. 22)

DL_Fim=NBfmin+1.25. (2Pim+1)/2=2134.9+1.25×(2×5+1)/2=2142 05 (MHz)  (Eq.23).

TABLE 1 UTRA FDD frequency bands DL Frequencies Operating UL FrequenciesUE transmit, UE receive, Node Band Node B receive B transmit 1 1920-1980MHz 2110-2170 MHz 2 1850-1910 MHz 1930-1990 MHz 3 1710-1785 MHz1805-1880 MHz 4 1710-1755 MHz 2110-2155 MHz 5  824-849 MHz  869-894 MHz6  830-840 MHz  875-885 MHz

With the operating band shown in Table. 1, the center frequency of theuplink operating frequency band of the mobile station and the IM groupcenter frequency can be calculated.

UL_Fs=DL_Fs−190=1952.4 (MHz)  (Eq. 24)

UL_Fim=DL_Fim−190=1952.05 (MHz)  (Eq. 25)

FIGS. 16 and 17 are views for explaining a process when the mobilestation is powered on and transits to the idle mode; FIG. 16 is aflowchart for explaining the process in this case; and FIGS. 17(A) and17(B) show the bands used by the mobile station and main channels usedin the procedures for the uplink and the downlink, respectively. In FIG.17, reference numerals (reference numerals of steps of the mobilestation) are added for correlation with the flow of FIG. 16.

In FIG. 17, B1, B2, B3, B4, and B5 denote frequency bandwidths of 1.25MHz, 2.5 MHz, 5 MHz, 10 MHz, and 20 MHz, respectively. By way ofexample, a control flow of the mobile station in the B3 mobile stationclass will be described.

After power-on, the mobile station performs the selection (band search)of the public mobile communication network PLMN (Public Land MobileNetwork) (step S11). The base station transmits information through thedownlink common pilot channel DPCH, the downlink synchronization channelDSNCH, and the downlink common control channel DCCCH (step S21).

The mobile station uses the own IMSI, the base-station unique frequencybandwidth MBnb, and the base-station downlink center frequency NBfcacquired through the band search to calculate the operating frequencyband position number Ps, the IM group number Pim, the PI group numberPpi, the center frequency DL_Fs of the mobile-station downlink operatingfrequency band, the downlink IM group center frequency DL_Fim, thecenter frequency UP_Fs of the mobile-station uplink operating frequencyband, and the uplink IM group center frequency UP_Fim (step S12).

In accordance with the center frequencies DL_Fs1, UL_Fs1 of theoperating frequency band calculated from the above known parameters, themobile station sets the local RF frequency oscillation circuit(synthesizer) of the radio portion 202 and performs the frequency shiftto the operating frequency band position. The mobile station thenperforms initial cell selection (cell search) (step S13), receives thebroadcast information (step S14), and starts an initial locationregistration process.

The downlink common pilot channel DPCH and the downlink synchronizationchannel DSNCH used at the time of the initial cell selection arereceived in the operating frequency band with the center frequency ofDL_Fs1 calculated above. Similarly, the downlink common control channelDCCCH used at the time of receiving the broadcast information is alsoreceived in the operating frequency band with the center frequency ofDL_Fs1 calculated above. The load of control in the mobile station isalleviated by using the same band as the band for receiving the downlinkcommon pilot channel DPCH, the downlink synchronization channel DSNCH,and the downlink common control channel DCCCH and the operatingfrequency band at the time of the idle mode.

As shown in FIGS. 18 and 19, in the downlink radio frame structure withthe downlink common control channel DCCCH mapped on the center frequencyNBfc of the base-station unique frequency bandwidth MBnb, the initialcell selection step and the broadcast information reception step areexecuted at the center frequency NBfc of the base-station uniquefrequency bandwidth MBnb (see step 13 and step 14 of FIG. 17). After thebroadcast information is received, the operating frequency band positionnumber Ps, the IM group number Pim, and the PI group number Ppi may becalculated in some structures.

To receive the downlink common control channel DCCCH in the operatingfrequency band with the center frequency of DL_Fs1 calculated above, asshown in FIGS. 20 and 21, the downlink common control channel DCCCH mustbe mapped onto the downlink radio frame structure shown in FIGS. 18 and19 for every 1.25-MHz bandwidth or every Chunk. We propose as acountermeasure method to arrange the downlink common control channelDCCCH throughout the downlink unique frequency bandwidth MBnb for every1.25-MHz bandwidth or every chunk, to copy what is common to all themobile stations, and to add and arrange pieces of information specificto respective bands or Chunks as needed. P The initial locationregistration process will then be described. The mobile station uses theuplink contention-based channel UCBCH to transmit a request signal forthe uplink packet access at the start of the initial locationregistration process (step S15). This uplink packet access requestsignal includes the subscriber identification information IMSI. Whenreceiving the uplink packet access request signal, the base stationtransmits an uplink packet access permission signal including thedefault scheduling setup information and RNTI (Radio Network TemporaryID), which is a number for identifying the mobile station in the basestation. As a result, a radio bearer is established.

The uplink contention-based channel UCBCH and the downlink schedulingchannel DSCH used in this case are transmitted/received at the operatingfrequency band positions calculated above. Therefore, the collisionfrequency is reduced at the time of the uplink request, and theprocedures are reduced in the initial scheduling of the downlink.

Once the radio bearer is established, a location registration message istransmitted to a higher-level node of the network. When receiving thelocation registration message, the higher-level node transmits temporarysubscriber identification information, for example, TMSI (TemporaryMobile Subscriber Identity), TMEI (Temporary Mobile Equipment Identity),a temporary IP address, etc., along with approval of the locationregistration. A key exchange protocol and an authentication process areexecuted at the same time (step S16, step S23). The uplink schedulingchannel USCH and the downlink scheduling channel DSCH used in this caseare transmitted/received in the operating frequency bands with thecenter frequencies of UL_Fs1, DL_Fs1 calculated above.

The mobile station and the base station recalculate the operatingfrequency band position number Ps, the IM group number Pim, and the PIgroup number Ppi with the above calculating equations from the temporarysubscriber identification information (steps S17 and S24). In accordancewith the center frequencies DL_Fs2, UL_Fs2 of the calculated operatingfrequency band, the mobile station performs the frequency shift to theoperating frequency band position. When the location registration iscompleted, the radio bearer is released and the mobile station shifts tothe idle mode.

FIGS. 22 and 23 are views for explaining a process at the time of theidle mode; FIG. 22 is a flowchart for explaining the process flow inthis case; and FIGS. 23(A) and 23(B) show the bands used by the mobilestation and main channels used in the procedures for the uplink and thedownlink, respectively. In FIG. 23, reference numerals (referencenumerals of steps of the mobile station) are added for correlation withthe flow of FIG. 22.

The mobile station shifted to the idle mode receives the downlink commonpilot channel DPCH, the downlink synchronization channel DSNCH, and thedownlink common control channel DCCCH transmitted from the base stationto periodically perform the cell selection and update the broadcastinformation (steps S31, S32, and S41).

In this case, the downlink common pilot channel DPCH, the downlinksynchronization channel DSNCH, and the downlink common control channelDCCCH are received at the center frequency NBfc of the base-stationunique frequency bandwidth MBnb for the downlink radio frame structureshown in FIGS. 18 and 19. The operating frequency band with thecalculated center frequency of DL_Fs2 may also be used as the operatingfrequency band position at the time of the idle mode for the downlinkradio frame structure shown in FIGS. 20 and 21 in some structures.

The mobile station checks whether the registration area indicated by thebroadcast information is changed (step S33). If the registration area isnot changed, it is checked whether a location registration timer hasexpired (step S34). If the location registration timer has not expired,a reception procedure for the packet indicator PI is started. If theregistration area is changed or the location registration timer hasexpired, a location registration process is executed (steps S35 andS42).

The location registration process includes steps of the uplink packetaccess request through the uplink contention-based channel UCBCH, theestablishment of the radio bearer, the transmission and reception of thelocation registration information thorough the uplink scheduling channelUSCH and the downlink scheduling channel DSCH, and the release of theradio bearer as is the case with the initial location registrationprocess described in FIGS. 16 and 17 (the operation frequency band isdifferent).

After the location registration process is completed, the locationregistration timer is set (step S36), and the reception procedure forthe packet indicator PI is started. Although only the timer for locationregistration has been described here, the timer for cell search or thetimer for PI may be prepared.

FIGS. 24 and 25 are views for explaining a control process for anincoming packet; FIG. 24 is a flowchart for explaining the process flowin this case; and FIGS. 25(A) and 25(B) show the bands used by themobile station and main channels used in the procedures for the uplinkand the downlink, respectively. In FIG. 25, reference numerals(reference numerals of steps of the mobile station) are added forcorrelation with the flow of FIG. 24.

When transmitting a packet to the mobile station shifted to the idlemode, the base station calculates the IM group Pim and the PI group Ppifrom the IMSI of the packet destination and sets the packet indicator PI(step S61). The mobile station shifted to the idle mode receives thepacket indicator PI at the position indicated by the IM group Pim andthe PI group Ppi obtained from the above calculating equations throughthe discontinuous reception (step S51).

If the packet indicator PI indicates an incoming packet (step S52), thedownlink scheduling channel DSCH is received to acquire detailinformation related to paging (corresponding to the paging informationof the W-CDMA mode) included in the paging channel PCH (logical channel)(steps S53 and S62). If the packet indicator PI indicates no incomingpacket at step S52, the packet indicator PI is received that is includedin the next radio frame or in the radio frame after a plurality of radioframe intervals (discontinuous reception).

The position of the paging channel PCH to be received by the mobilestation is preliminarily determined in association with the position ofthe packet indicator PI. If the mobile station acquires informationidentifying itself (such as IMSI, IMEI, IP address, and RNTI) from thedetail information related to paging, the mobile station executes theradio bearer establishing procedure (steps S54, S55, and S63). Themobile station receives packet indicator PI included in the next radioframe or in the radio frame after a plurality of radio frame intervals(discontinuous reception) if the incoming packet is not addressed toitself.

After the radio bearer is established, the mobile station startsreceiving the packet through the downlink scheduling channel DSCH (stepS56). The base station transmits the packet through the downlinkscheduling channel DSCH until the buffer of user data becomes empty(step S64). When the buffer of the base station becomes empty, the radiobearer is released (steps S65 and S66). The packet transmissionprocedure is then started. Although only the packet reception has beendescribed here, the packet transmission may concurrently be performed.

FIGS. 26 and 27 are views for explaining a control process at the timeof packet transmission; FIG. 26 is a flowchart for explaining theprocess flow in this case; and FIGS. 27(A) and 27(B) show the bands usedby the mobile station and main channels used in the procedures for theuplink and the downlink, respectively. In FIG. 27, reference numerals(reference numerals of steps of the mobile station) are added forcorrelation with the flow of FIG. 26.

If a packet to be transmitted exists (step S71), the mobile station usesthe uplink contention-based channel UCBCH to transmit a request signalfor the uplink packet access (step S72). When receiving the requestsignal for the uplink packet access (step S81), the base stationtransmits an uplink packet access permission signal including thedefault scheduling setup information and RNTI (Radio Network TemporaryID), which is a number for identifying the mobile station in the basestation. As a result, a radio bearer is established (steps S73 and S82).

When the radio bearer is established, the mobile station transmits thepacket through the uplink scheduling channel USCH (steps S74 and S83).When the data buffer of the mobile station becomes empty (step S75), theradio bearer is released (steps S76 and S84). The mobile station goesback to the control procedure at the time of the idle mode.

Although the mobile station in the idle mode transmits/receives thechannels in the own unique frequency bandwidth in the above description,the transmission/reception may be designed to be performed in thebandwidth Bim (=B1) used by the IM group to reduce the power consumptionat the time of the idle mode. During communication, the mobile stationuses a bandwidth ranging from Bim to the unique frequency bandwidth Bndepending on a data amount.

With the method described above, the operating frequency bands of thechannels used by the mobile station can be specified with thecommunication between the base station and the mobile station reduced tothe minimum.

FIGS. 28, 29, and 30 are views of respective exemplary structures of thedownlink radio frame of the present invention, showing the optimumarrangements of the broadcast information, the downlink synchronizationchannel DSNCH, the packet indicator PI, and the downlink shared controlsignaling channel DSCSCH based on FIG. 4. In each of FIGS. 28 to 30, (A)shows a structure of the downlink radio frame, and (B) shows an image ofthe discontinuous reception operation in conformity to (A).

In FIG. 28, the downlink common control channel DCCCH is located in theTTI at the beginning of the radio frame for every IM group bandwidth Bimand can be received in the bandwidth specified by the IM group at thetime of the idle mode. The packet indicator PI is located in each TTI byfurther dividing the IM group. In this case, the packet indicator PI ismapped as a portion of the downlink shared control signaling channelDSCSCH.

With the above structure, at the time of the idle mode, the mobilestation can perform the cell search, the timing synchronization, and thereception of the broadcast information and the packet indicator PI inthe band specified by the IM group and the process of the frequencyshift can be omitted. Since the packet indicator PI is mapped on thedownlink shared control signaling channel DSCSCH, the packet receptionprocess in the case of the active mode can be made common to theincoming packet process in the idle mode in the mobile station.

The discontinuous reception operation in this structure is adiscontinuous reception method of turning on the receiving portion forthe periods of the downlink common pilot channel DCPCH, the downlinkcommon control channel DCCCH, the downlink synchronization channel DSNCHof the TTI at the beginning of the frame, and the downlink sharedsignaling channel DSCSCH having the paging indicator PI mapped thereon,and turning off the receiving portion for other periods.

In FIG. 29, the downlink common control channel DCCCH is located in theTTI at the beginning of the radio frame for every IM group bandwidth Bimas is the case with FIG. 28 and can be received in the bandwidthspecified by the IM group at the time of the idle mode. However, thepacket indicator is mapped as a portion of the downlink common controlchannel DCCCH. With this structure, at the time of the idle mode, themobile station can perform the cell search, the timing synchronization,and the reception of the broadcast information and the packet indicatorPI in the band specified by the IM group of the TTI at the beginning andthe process of the frequency shift can be omitted.

The discontinuous reception operation in this structure is adiscontinuous reception method of turning on the receiving portion forthe periods of the downlink common pilot channel DCPCH, the downlinkcommon control channel DCCCH, and the downlink synchronization channelDSNCH of the TTI at the beginning of the frame and turning off thereceiving portion for other periods.

In FIG. 30, the downlink common control channel DCCCH is located in acertain B1 bandwidth in the TTI at the beginning of the radio frame. Themobile station shifts to the certain B1 bandwidth at the time of thecell search, the timing synchronization, and the reception of thebroadcast information. The packet indicator PI is mapped as a portion ofthe downlink common control channel DCCCH.

The discontinuous reception operation in this structure is adiscontinuous reception method of turning on the receiving portion forthe periods of the downlink common pilot channel DCPCH, the downlinkcommon control channel DCCCH, and the downlink synchronization channelDSNCH of the TTI at the beginning of the frame and turning off thereceiving portion for other periods.

Although not shown, the downlink common control channel DCCCH may belocated in a certain B1 bandwidth in the TTI at the beginning of theradio frame and the packet indicator PI may be mapped onto the downlinkshared control signaling channel.

As shown in FIG. 5, the downlink common pilot channel DCPCH, thedownlink common control channel DCCCH, and the downlink shared controlsignaling channel DSCSCH may alternately be arranged in sub-carriers.

Although the candidates for the operating frequency band of the mobilestation in the idle mode are arranged to be distributed over the entireunique frequency bandwidth of the base station in the above description,the candidates may be arranged to be distributed over a certain limitedrange of the frequency bandwidth within the unique frequency bandwidthof the base station. For the calculating equations in such a case, theunique frequency band of the base station of the equations 1 to 6 may bereplaced with the limited range of the frequency bandwidth.

Although it is desirable that the operating frequency band position ofthe mobile station at the time of the idle mode is included in theoperating frequency band of the mobile station, the subscriberidentification information may be utilized to separately calculate theoperating frequency band of the mobile station at the time of the idlemode and the operating frequency band of the mobile station. Forexample, the downlink common control channel DCCCH and the packetindicator PI may be located in a certain range of the frequencybandwidth and the remaining bandwidth may be used as the frequency bandfor transmitting/receiving packets. For the calculating equations insuch a case, the unique frequency band of the base station of theequations 1 to 6 may be replaced with the limited range of the frequencybandwidth.

FIG. 31 is a view of respective exemplary structures of the basestation, the mobile station, and a location management device related toanother embodiment of the present invention. In FIG. 31, the basestation 100 is made up of an antenna portion 111, a radio portion 112, acontrol portion 113, and a communication IF 114; the mobile station 200is made up of an antenna portion 211, a radio portion 212, and a controlportion 213, and a location management device 300 is made up of alocation management database 301, a control portion 302, and acommunication IF 303. The base station 100 corresponds to a base stationdevice of the present invention and the mobile station 200 correspondsto a mobile station device of the present invention.

A principle of operation of the base station 100, the mobile station200, and the location management device 300 assumed based on theproposition of 3GPP will briefly be described with reference to FIG. 31.

In the base station 100, if the base station 100 receives packet data(including the subscriber identification information, for example, IMSI)addressed to the mobile station 200 through the communication IF 114from a higher-level network node, the packet data are stored in abase-station transmission data buffer (not shown). For the downlinktransmission data from the transmission data buffer, the control portion113 performs the channel mapping and the scheduling. The downlinktransmission data are subjected to the encoding process and the OFDMsignal process by the radio portion 112 and converted into the RF (RadioFrequency) frequency band by a transmission circuit of the radio portion112, and the downlink signal is transmitted from the antenna portion111.

On the other hand, the uplink signal sent from the mobile station 200 isreceived by the antenna portion 111 of the base station 100 andconverted from the RF frequency to IF or directly to the base band by areception circuit of the radio portion 112 for demodulation. The uplinksignal may be an OFDM signal, an MC-CDMA (Multi-Carrier-CDMA) signal, ora single carrier SC signal and a VSCRF-CDMA (Variable Spreading and ChipRepetition Factors-CDMA) signal for reducing PAPR (see, e.g., JapaneseLaid-Open Patent Publication No. 2004-197756, “Mobile Station, BaseStation, and Wireless Transmission Program and Method”). When receivingthe packet to the higher-level network node from the mobile station 200,the control portion 113 of the base station 100 transfers the packetthrough the communication IF 114 to the higher-level network node.

The scheduling in the control portion 113 of the base station 100 isperformed based on the uplink CQI information, the downlink CQIinformation feedback from the mobile station 200, the downlink/uplinktransmission data buffer information of the mobile stations, theuplink/downlink QoS (Quality of Service) information, various pieces ofservice class information, the mobile station class information, thesubscriber identification information, etc. These pieces of the inputinformation are put together and the uplink/downlink AMC information isgenerated in accordance with a selected scheduling algorithm toimplement the transmission/reception scheduling of the packet data.

When receiving a paging request to the mobile station 200 through thecommunication IF 114 from the location management device 300, thecontrol portion 113 of the base station 100 instructs the radio portion112 to map the packet indicator (corresponding to the paging indicatorchannel PICH of the W-CDMA mode) and the paging information(corresponding to the paging channel PCH of the W-CDMA mode) to themobile station 200. The mapping position instruction information isgenerated based on the paging request (including IMSI and the availablefrequency bandwidth of the mobile station). When an attach/locationregistration request to the location management device 300 is receivedfrom the mobile station 200, the request is transferred through thecommunication IF 114 to the location management device 300.

The mobile station 200 then receives the downlink OFDM signal with theantenna portion 211, converts the downlink reception signal from the RFfrequency to IF or directly to the base band with a local RF frequencyoscillation circuit (synthesizer), a down converter, a filter, anamplifier, etc., of the radio portion 212, and performs the OFDMdemodulation and the channel decoding to decode the packet data. In theradio portion 212 of the mobile station 200, the uplink transmissiondata, i.e., individual packet data of the mobile station 200 are encodedwith the use of the information extracted by the control portion 213 andis subjected to the data modulation and transmitted along with thedownlink CQI information with the use of the downlink AMC information.

The control portion 213 of the mobile station 200 extracts the downlinkchannel control information (such as the packet indicator PIinformation, the packet paging information, the downlink accessinformation, and the broadcast information). The control portion 213extracts and outputs the downlink AMC mode and the downlink AMCinformation such as the downlink scheduling information, and the uplinkAMC mode and the uplink AMC information such as the uplink schedulinginformation to the radio portion 212. The control portion 213 performsthe scheduling based on the downlink channel control information and thedownlink scheduling information sent out from the base station 100, andthe uplink scheduling information.

The control portion 213 of the mobile station sends to the radio portion212 a control signal causing a shift to the specified or calculatedcenter frequency retained by the mobile station class information, theunique frequency bandwidth information, and the subscriberidentification information. The local RF frequency oscillation circuit(synthesizer) of the radio portion 212 performs the shift to the centerfrequency

The control portion 213 detects the need for the attach and the locationregistration process from the broadcast information and controls thelocation registration procedure as needed. The control portion 213 alsoacquires the packet indicator PI information to control the incomingpacket process.

In the mobile station 200, the base band signal is converted to the RFfrequency band by the local RF frequency oscillation circuit(synthesizer), an upconverter, a filter, and an amplifier of the radioportion 212 and the uplink signal is transmitted from the antennaportion 211. The radio portion 212 includes IF and RF filterscorresponding to the above different frequency bandwidths (e.g., 1.25MHz, 2.5 MHz, 5 MHz, 10 MHz, 20 MHz).

The location management device 300 corresponds to the VLR and HLR of theW-CDMA mode and receives and registers a location registration requestfrom the mobile station 200 into the location management database 301.If an incoming call to the mobile station 200 exists, the registrationinformation of the mobile station 200 is acquired from the locationmanagement database and a paging request is transmitted through thecommunication IF 303 to the base station in the location registrationarea. The location registration and paging procedures are controlled bythe control portion 302.

FIGS. 32 and 33 are views for explaining one embodiment of the presentinvention. This embodiment proposes a paging and location registrationmethod in a system containing mobile stations with different frequencybandwidths (e.g., 1.25 MHz, 2.5 MHz, 5 MHz, 10 MHz, 20 MHz) assumedbased on the proposition of 3GPP for the EUTRA.

In FIG. 32, if an incoming packet to the mobile station 200 exists forthe location management device 300, the location management device 300acquires the registration information of the mobile station 200 from thelocation management database 301 and transmits a paging request to thebase station 100 in a location registration area 400.

If the unique frequency bandwidth of the base station is 20 MHz, therespective mobile stations 200 with different frequency bandwidths (inthis case, the mobile stations with frequency bandwidth abilities of1.25 MHz and 20 MHz) receive a paging signal in the downlink frequencybands used respectively.

The paging signal refers to the packet indicator PI or the paginginformation. The paging is performed by acquiring the locationregistration area 400 of the mobile station 200 having an incomingpacket from the location management database 301 and by sending out apaging request from the location management device 300 to the basestation 100 of the location registration area 400. Since the basestation 100 does not know what frequency band position is used by themobile station 200 at this time, information identifying the operatingfrequency band position of the mobile station 200 having the incomingpacket must be included in the information of the paging request.

FIG. 33 is a view for explaining the location registration processexample of the mobile station.

The mobile station 200 performs the attach/location registration processat the time of power-on, at the time of location registration areaupdate, and when a location registration period has been expired. Themobile station 200 sends out a location registration request through thebase station 100 to the location management device 300. This locationregistration request includes the subscriber identification information(IMSI or IP address) and information indicating the available frequencybandwidth of the mobile station 200 or the operating frequency bandposition of the mobile station 200. If the available frequency bandwidthof the mobile station 200 is registered, the base station 100 needs analgorithm for identifying the operating frequency band position of themobile station 200 based on the subscriber identification informationand the available frequency bandwidth of the mobile station at the timeof paging.

FIG. 34 is a view for explaining a numbering method of identifying theoperating frequency band position of the mobile station used at the timeof location registration and the time of paging.

FIG. 34(A) shows candidates of frequency band positions used by themobile stations with different available frequency bandwidths when it isassumed that the unique frequency bandwidth of the base station is 20MHz. The operating band of the mobile station having the 20-MHzbandwidth or 15-MHz bandwidth ability is inevitably determined sinceonly one option exists as shown in FIG. 34(A). The operating band of themobile station having the 10-MHz bandwidth ability has two candidates(Nos. 0 and 1); the operating band of the mobile station having the5-MHz bandwidth ability has four candidates (Nos. 0 to 3); the operatingband of the mobile station having the 2.5-MHz bandwidth ability haseight candidates (Nos. 0 to 7); and the operating band of the mobilestation having the 1.25-MHz bandwidth ability has 16 candidates (Nos. 0to 15).

FIG. 34(B) shows classification of the mobile stations having respectiveavailable bandwidths. In this case, ID Nos. 0 to 5 are assigned in theorder from 1.25 MHz to 20 MHz.

The operating frequency band position of the mobile station isidentified by including the candidate numbers of FIG. 34(A) and IDs ofFIG. 34(B) in the location registration request and the paging request.

An algorithm is then proposed that identifies the operating frequencyband position from the subscriber identification information IMSI andthe above mobile station classes. The operating frequency band positionis calculated from the subscriber identification information IMSI, theavailable frequency bandwidth Bn of the mobile station, the uniquefrequency bandwidth MBnb of the base station, the operating frequencyband position number Ps identifying the operating frequency bandposition, and the number of incoming groups Npi of the packet indicatoras follows.

number of candidates for shifted frequency position (Ns)=MBnb/Bn  (Eq.27)

shifted frequency position number (Ps)=IMSI/Npi mod Ns  (Eq. 28)

If the subscriber identification information IMSI and the ID indicatingthe available frequency bandwidth of the mobile station are included inthe location registration request and the paging request, the operatingfrequency band position of the mobile station can be identified with theabove calculating equations in the base station and the mobile station.

FIG. 35 is a view for explaining a procedure of location registrationaccording to the present invention.

The mobile station 200 performs the attach/location registration processat the time of power-on, at the time of location registration areaupdate, and when a location registration period has been expired.

First, a radio bearer is set between the base station 100 and the mobilestation 200 in accordance with a connection control procedure (S101).After the connection control procedure is completed, the mobile station200 sends out a location registration request through the base station100 to the location management device 300 (S102, S103). This locationregistration request includes the subscriber identification informationand the available frequency bandwidth of the mobile station 200.

When receiving the location registration request, the locationmanagement device 300 registers the subscriber identificationinformation (IMSI) and the available frequency bandwidth and thelocation registration area of the mobile station 200 into the locationmanagement database (S104). The location management device 300 returns alocation registration response to the mobile station 200 (S105, S106).Temporary subscriber identification information TMSI may be allocatedthrough this location registration response.

The authentication, the exchange of the private key, etc., areconcurrently performed in this location registration procedure.

FIG. 36 is a view for explaining a procedure of paging according to thepresent invention.

When receiving an incoming packet to the mobile station 200 (S111, thelocation management device 300 acquires the subscriber identificationinformation of the destination mobile station 200 of the packet and theavailable frequency bandwidth and the location registration area of themobile station 200 from the location management database and sends out apaging request including the subscriber identification information(IMSI) and the available frequency bandwidth of the mobile station tothe base station of the location registration area (S112).

When receiving the paging request, the base station 100 calculates andretains the operating frequency band position of the mobile station 200from the subscriber identification information and the availablefrequency bandwidth of the mobile station 200 (S113) and transmits thepacket of the paging request at the operating frequency band position(S114).

When receiving the paging request at the own operating frequency bandposition, the mobile station 200 sends out a response to the locationmanagement device 300 (S115, S116).

Although the available frequency bandwidth of the mobile station 200 isregistered in the location management device 300 in the description ofFIGS. 35 and 36, the operating frequency band position of the mobilestation 200 may be registered.

A program operating in the base station device, the mobile stationdevice, and the location management device related to the presentinvention is a program controlling a CPU, etc.,(program driving acomputer to implement functions) such that the location registrationmethod and the paging method of the mobile station related to thepresent invention are executed. The information handled by these devicesis temporarily accumulated in a RAM at the time of process, subsequentlystored in various ROMs and HDD, and read and modified/rewritten by theCPU as needed.

A recording medium having the program stored thereon may be any one of asemiconductor medium (e.g., ROM, nonvolatile memory card), an opticalrecording medium (e.g., DVD, MO, MD, CD, BD), a magnetic recordingmedium (e.g., magnetic tape, flexible disc), etc.

Although the functions of the above embodiment are implemented byexecuting the loaded program, the functions of the present invention mayalso be implemented by executing processes based on instructions of theprogram in conjunction with an operating system or other applicationprograms.

When distributing to the market, the program can be stored anddistributed in a portable recording medium or can be transferred to aserver computer connected through a network such as the internet. Inthis case, a storage device of the server computer is also included inthe recording medium of the present invention.

What is claimed is:
 1. A mobile station, comprising: a receiver,configured to receive a signal from a base station through a sharedcontrol signaling channel; wherein the signal indicates that paginginformation to the mobile station is included in a shared data channelof a slot, the slot being specified in accordance with identificationinformation of the mobile station, the shared control signaling channeland the shared data channel being co-located in a slot located within acommunication frame.
 2. The mobile station according to claim 1, whereinthe receiver is further configured to discontinuously receive the signalwhen in an idle mode.
 3. The mobile station according to claim 1,wherein a slot number for the slot is specified by (X/Y) mod Z, where Xis the identification information of the mobile station, Y is a totalnumber of paging groups, and Z is a total number of paging slots.
 4. Themobile station according to claim 1, wherein the identificationinformation of the mobile station is international mobile subscriberidentity (IMSI).
 5. The mobile station according to claim 1, wherein theshared control signaling channel is arranged at the head of the slot. 6.The mobile station according to claim 1, wherein the slot is atransmission timing interval (TTI).
 7. A base station, comprising: atransmitter, configured to transmit a signal through a shared controlsignaling channel; wherein the signal indicates that paging informationto a mobile station is included in a shared data channel of a slot, theslot being specified in accordance with identification information ofthe mobile station, and the shared control signaling channel and theshared data channel being co-located in a slot located within acommunication frame.
 8. The base station according to claim 7, wherein aslot number for the slot is specified by (X/Y) mod Z, where X is theidentification information of the mobile station, Y is a total number ofpaging groups, and Z is a total number of paging slots.
 9. The basestation according to claim 7, wherein the identification information ofthe mobile station is international mobile subscriber identity (IMSI).10. The base station according to claim 7, wherein the shared controlsignaling channel is arranged at the head of the slot.
 11. The basestation according to claim 7, wherein the slot is a transmission timinginterval (TTI).
 12. A communication method, comprising: transmitting, bya base station, a signal to a mobile station through a shared controlsignaling channel; wherein the signal indicates that paging informationto the mobile station is included in the shared data channel of a slot,the slot being specified in accordance with identification informationof a mobile station, and the shared control signaling channel and theshared data channel being co-located in a slot located within acommunication frame.
 13. The communication method according to claim 12,wherein a slot number for the slot is specified by, (X/Y) mod Z, where Xis the identification information of the mobile station, Y is a totalnumber of paging groups, and Z is a total number of paging slots. 14.The communication method according to claim 12, wherein theidentification information of the mobile station is international mobilesubscriber identity (IMSI).
 15. The communication method according toclaim 12, wherein the shared control signaling channel is arranged atthe head of the slot.
 16. The communication method according to claim12, wherein the slot is a transmission timing interval (TTI).
 17. Acommunication method, comprising: receiving by a mobile station, asignal from a base station through a shared control signaling channel;wherein the signal indicates that paging information to the mobilestation is included in the shared data channel of a slot, the slot beingspecified in accordance with identification information of the mobilestation, the shared control signaling channel and the shared datachannel being co-located in a slot located within a communication frame.18. The method according to claim 17, wherein the slot is a transmissiontiming interval (TTI).
 19. The method according to claim 17, wherein aslot number for the slot is specified by (X/Y) mod Z, where X is theidentification information of the mobile station, Y is a total number ofpaging groups, and Z is a total number of paging slots.
 20. The methodaccording to claim 17, wherein the shared control signaling channel isarranged at the head of the slot.